Use this guide to connect architectural principles with professional decisions: identifying constraints, coordinating designs, evaluating evidence and administering projects. Each concept includes a worked example and a mistake to avoid. Read the foundations before applying them to project scenarios. References identify the official assessment context; use the current HKIA/ARB Professional Assessment Handbook and applicable Hong Kong requirements to establish the precise obligations for a particular question or project.
Professional judgment and ethics
1. Competence and specialist advice
Professional competence includes recognizing the limits of your knowledge. Identify which decisions you can substantiate and which require specialist assessment. Seeking advice does not remove the need to coordinate that advice with the architectural design, communicate assumptions and resolve conflicting recommendations.
Worked example: A refurbishment introduces unusually heavy equipment. The architect obtains structural advice before fixing its location, then coordinates the engineer's requirements with circulation and maintenance access.
Mistake to avoid: Treating familiarity with similar buildings as proof that an unfamiliar structural condition is acceptable.
Reference: The Hong Kong Institute of Architects
2. Conflicts of interest
A conflict arises when another interest could influence professional judgment, even if no biased decision has yet occurred. Identify the interest, disclose relevant facts and establish an appropriate response before proceeding. Disclosure alone may be insufficient where objective advice cannot reasonably be maintained.
Worked example: An architect recommending suppliers discovers that a close relative owns one shortlisted firm. The relationship is disclosed, and an independent colleague evaluates that firm's proposal using the same criteria.
Mistake to avoid: Assuming a conflict exists only after someone proves that the recommendation was biased.
Reference: The Hong Kong Institute of Architects
3. Confidential information
Use project information for its authorized purpose and share it only with people who need it. Distinguish public design material from commercial, personal or security-sensitive information. Any disclosure required by an applicable obligation needs a considered response; confidentiality is not a reason to ignore a serious safety concern.
Worked example: A consultant needs an occupancy schedule but not tenant contact details. The architect issues the schedule with personal information removed, preserving the data needed for coordination.
Mistake to avoid: Forwarding an entire project folder because some files are relevant to the recipient.
Reference: The Hong Kong Institute of Architects
4. Accurate professional representations
Separate established facts, professional opinions and assumptions when presenting advice. State the evidence and limitations behind an opinion, and correct material errors when discovered. A confident presentation should not turn an unresolved design condition into a claim of verified performance or approval.
Worked example: A report initially describes a wall as loadbearing. After investigation shows that its role remains uncertain, the architect revises the report and identifies the further assessment needed.
Mistake to avoid: Leaving an outdated statement uncorrected because the original report has already been circulated.
Reference: The Hong Kong Institute of Architects
5. Objective assessment under competing pressures
When assessing work or giving a contract-related opinion, distinguish evidence from the preferences of the party paying your fee. Establish the relevant criteria, examine the records and explain the conclusion. The appointment and contract determine the particular role; objectivity requires applying that role consistently.
Worked example: A client wants an unfavorable workmanship finding withdrawn. Inspection records show the defect remains, so the architect retains the finding and explains the evidence supporting it.
Mistake to avoid: Changing a technical conclusion solely to preserve a commercial relationship.
Reference: The Hong Kong Institute of Architects
6. Responding to a serious safety concern
A credible safety concern requires prompt communication to the responsible people, a clear record and assessment by competent parties. Distinguish an observed condition from an established cause. Follow applicable emergency arrangements where danger is immediate, and do not give technical clearance beyond your competence or authority.
Worked example: New cracking appears beside temporary works. The architect promptly reports the location and observations to the responsible site team and requests competent assessment before affected work proceeds.
Mistake to avoid: Describing unexplained cracking as harmless without an adequate investigation.
Reference: The Hong Kong Institute of Architects
7. Attribution and permission to use design material
Authorship, possession and permission to reuse material are different questions. A drawing available in a project archive is not automatically available for another commission or public presentation. Check relevant agreements, permissions and attribution requirements before incorporating another person's work.
Worked example: A practice wants to reuse a consultant's diagram in a new brochure. It checks the agreed usage rights, obtains permission where needed and credits the diagram accurately.
Mistake to avoid: Assuming payment for a deliverable grants unrestricted rights to reproduce or adapt it.
Reference: The Hong Kong Institute of Architects
8. Environmental tradeoffs over a building's life
Evaluate environmental decisions across manufacture, construction, operation, maintenance and replacement. A measure that saves operational energy may introduce material impacts or maintenance burdens. Compare alternatives using consistent boundaries and explain uncertainties rather than reducing sustainability to a single product label.
Worked example: Two facade options have similar thermal performance. One needs frequent replacement of a difficult-to-access component, so the team includes replacement impacts and access requirements in its comparison.
Mistake to avoid: Selecting a product solely because its marketing describes it as environmentally friendly.
Reference: The Hong Kong Institute of Architects
Site, planning and development
9. Independent layers of development control
Planning controls, land conditions, building requirements and private rights answer different questions. A proposal may satisfy one layer while remaining constrained by another. For a Hong Kong project, identify the current documents governing each layer and record unresolved conditions before treating a development option as feasible.
Worked example: A proposed extension fits a preliminary building envelope, but a land condition restricts its intended use. The team keeps the option conditional while obtaining clarification.
Mistake to avoid: Treating one approval or favorable assessment as confirmation that every development constraint is satisfied.
Reference: The Hong Kong Institute of Architects
10. Reliable site information
Distinguish measured site conditions from assumptions, historic records and information awaiting verification. Boundaries, levels, adjacent structures and services influence decisions differently. Record the origin and accuracy of each dataset so the team knows which conclusions can safely depend on it.
Worked example: An old drawing shows a service below a proposed entrance. Because its position is unverified, the entrance arrangement remains provisional until appropriate investigation confirms the service location.
Mistake to avoid: Giving an old record drawing the same evidential weight as a current verified survey.
Reference: The Hong Kong Institute of Architects
11. Constraints and opportunities in site analysis
Site analysis should translate observations into design consequences. A constraint limits options; an opportunity supports a particular response. The same feature can do both. Explain how topography, orientation, surroundings and existing assets affect the proposal instead of merely listing them.
Worked example: A steep site creates difficult level access but offers a lower-level entrance from a second street. The design studies that entrance while checking whether a continuous accessible route can be achieved.
Mistake to avoid: Producing a descriptive site inventory without showing how it changes the design.
Reference: The Hong Kong Institute of Architects
12. Development capacity and area arithmetic
A preliminary capacity calculation links a defined site area to an assumed development ratio. Its result is only meaningful if both terms use the applicable definitions. Separate the arithmetic from the legal determination of what counts, what is excluded and which constraint governs.
Worked example: For an illustrative 900-square-metre site and an assumed ratio of 4, the calculated area is 3,600 square metres. This establishes an option-study allowance, not an approved entitlement.
Mistake to avoid: Presenting a correct multiplication as proof that the resulting floor area is legally available.
Reference: The Hong Kong Institute of Architects
13. Public and private spatial interfaces
An interface between a building and public space needs clear arrangements for access, ownership, maintenance and everyday use. Physical openness does not establish a right of access. Design the edge so movement, security and servicing can coexist without relying on ambiguous responsibilities.
Worked example: A recessed entrance includes seating beside a public pavement. The team defines the site boundary and maintenance responsibility, then keeps the pedestrian route clear of seating and door swings.
Mistake to avoid: Assuming an attractive publicly accessible space has no ownership or management constraints.
Reference: The Hong Kong Institute of Architects
14. Access and servicing as a spatial system
Evaluate pedestrian entry, deliveries, waste collection and maintenance together. A route can work geometrically yet fail operationally if vehicles, goods or queues obstruct another function. Study expected movements and timing, then check any applicable access and transport requirements.
Worked example: Deliveries cross the principal entrance during opening hours. The proposal relocates the receiving point to a secondary frontage and provides storage so goods do not accumulate on the entrance route.
Mistake to avoid: Checking vehicle entry while ignoring unloading, onward movement and waiting space.
Reference: The Hong Kong Institute of Architects
15. Massing and neighboring environmental effects
Building massing influences daylight, shade, views and airflow around both the proposal and its neighbors. Compare alternatives using the same assumptions and relevant environmental studies. A smaller footprint does not necessarily create less impact if the resulting height or orientation changes substantially.
Worked example: Two schemes provide similar floor area. The taller, narrower option casts a longer afternoon shadow onto a neighboring courtyard, so the team evaluates that consequence alongside its larger ground-level opening.
Mistake to avoid: Judging neighboring impact from a plan footprint alone.
Reference: The Hong Kong Institute of Architects
16. Phasing and stakeholder dependencies
A phased development must maintain essential access, services and functions during intermediate conditions. Map which activities depend on each phase and identify who must agree to changes. A workable final arrangement does not establish that the transition between existing and completed conditions is workable.
Worked example: A campus replaces its only service yard. The team establishes a temporary receiving area before closing the existing yard, allowing deliveries to continue through the first construction phase.
Mistake to avoid: Assessing only the completed master plan and overlooking the operational consequences of intermediate stages.
Reference: The Hong Kong Institute of Architects
Building control and coordinated compliance
17. Requirements matrices and traceable decisions
A requirements matrix connects each applicable requirement with its source, design response, responsible person and verification evidence. Separate mandatory requirements from client preferences and unresolved interpretations. For Hong Kong applications, confirm current provisions rather than importing assumptions from another jurisdiction.
Worked example: A project records accessible entrance requirements, the proposed route and the drawings demonstrating it. An unresolved interpretation receives a named owner and remains open until clarified.
Mistake to avoid: Marking an item compliant merely because a related feature appears on a drawing.
Reference: The Hong Kong Institute of Architects
18. Use and occupancy as design inputs
The activities a building accommodates affect circulation, fire strategy, services and environmental needs. Describe actual occupancy and processes rather than relying on a room label. A proposed change of use requires review of the requirements and permissions applicable to the changed conditions.
Worked example: An office floor is proposed as a training venue with concentrated attendance. The team reassesses occupant demand, escape arrangements and facilities instead of retaining the office assumptions.
Mistake to avoid: Assuming unchanged floor area means an altered use creates no new design or approval issues.
Reference: The Hong Kong Institute of Architects
19. Area definitions and consistent measurement
Different area measures serve different purposes, including development control, accommodation schedules and cost planning. State the measurement convention before calculating or comparing areas. An exclusion under one convention need not apply under another, so reconcile the figures rather than forcing them to match.
Worked example: A schedule lists 800 square metres of usable rooms and 200 square metres of circulation. Its 1,000-square-metre subtotal is not automatically the area used for a statutory calculation.
Mistake to avoid: Substituting a convenient accommodation total for an area defined by an applicable control.
Reference: The Hong Kong Institute of Architects
20. Escape routes as a connected network
Assess escape from occupied spaces through the complete route to its intended destination. Door arrangements, travel paths, shared sections and downstream restrictions interact. Applicable Hong Kong criteria must govern the assessment; a generous corridor in one location cannot compensate automatically for a deficient element elsewhere.
Worked example: Two rooms discharge into a shared passage with a narrower downstream doorway. The team assesses that shared restriction against the combined demand rather than checking each room in isolation.
Mistake to avoid: Counting exits without examining where their routes converge or become constrained.
Reference: The Hong Kong Institute of Architects
21. Continuity of fire separation
Fire separation depends on a complete assembly, including junctions, doors, penetrations and concealed spaces. A wall description alone does not establish the performance of the whole boundary. Coordinate services and tested systems with the required strategy, using competent specialist input where necessary.
Worked example: A duct crosses a proposed fire-separating wall. The team coordinates the penetration treatment and any required protective components rather than leaving the opening as an unspecified builder's detail.
Mistake to avoid: Checking the wall material while overlooking gaps created by services or adjoining construction.
Reference: The Hong Kong Institute of Architects
22. A continuous accessible route
Accessibility is a sequence of usable connections between arrival, entrance and intended facilities. Review changes in level, thresholds, maneuvering space, controls and doors together. A single accessible feature does not make a destination accessible if another part of the journey prevents independent use.
Worked example: A lift serves the meeting floor, but a stepped lobby lies between the entrance and lift. The route is revised to remove that discontinuity before the lift is credited as solving access.
Mistake to avoid: Using the presence of a lift as evidence that the entire building route is accessible.
Reference: The Hong Kong Institute of Architects
23. Vertical circulation and functional resilience
Choose vertical circulation by considering everyday movement, accessibility, servicing and the relevant emergency strategy separately. Passenger lifts, goods movement and stairs perform different functions. Check capacity and availability assumptions, including how maintenance or temporary unavailability affects intended activities.
Worked example: A shared lift must carry visitors and bulky deliveries. The team studies competing demand and servicing arrangements instead of assuming its nominal capacity proves that both functions will work.
Mistake to avoid: Treating all vertical circulation systems as interchangeable because they connect the same floors.
Reference: The Hong Kong Institute of Architects
24. Sanitary provision as a coordinated function
Sanitary facilities require more than sufficient fixture counts. Their distribution, accessibility, privacy, ventilation, drainage and maintenance arrangements must fit the occupancy. Establish the applicable provision requirements, then test whether the resulting layout can function within the building and services strategy.
Worked example: A toilet layout meets a preliminary fixture schedule but blocks access to a service riser. The team revises the arrangement so maintenance does not require dismantling a cubicle.
Mistake to avoid: Accepting a fixture schedule without checking the spatial and servicing consequences.
Reference: The Hong Kong Institute of Architects
25. Existing buildings and proposed alterations
An alteration should begin with understanding the existing building and the effects of the proposed change. Review structural behavior, services, fire strategy and relevant permissions together. Historic drawings help frame an investigation but do not establish the current condition or authorize new work.
Worked example: A new opening is proposed in an existing wall. The team verifies its construction and structural role, coordinates specialist assessment and checks the approval implications before finalizing the alteration.
Mistake to avoid: Assuming a small architectural change has only a local effect on building performance.
Reference: The Hong Kong Institute of Architects
26. Coordinated submissions
Submission information should describe one consistent proposal across drawings, schedules and supporting reports. Resolve differences in geometry, terminology and assumptions before issue. A coordinated package helps reviewers understand the design, but submission itself does not establish approval or relieve the team of further requirements.
Worked example: Plans show one stair arrangement while a supporting strategy uses an earlier layout. The team updates the strategy and checks connected assumptions before submitting the package.
Mistake to avoid: Assuming each consultant's internally consistent document makes the combined submission consistent.
Reference: The Hong Kong Institute of Architects
27. Design changes after an approval
Compare proposed changes with the conditions and scope of the relevant approval. A modification can affect more than the sheet on which it appears. Establish whether further review or amendment is needed under current procedures before relying on the earlier decision.
Worked example: Relocating a plant room changes service penetrations and an adjacent escape route. The team reviews both consequences and determines the required amendment process before issuing the revised construction information.
Mistake to avoid: Assuming an earlier approval automatically covers later design revisions.
Reference: The Hong Kong Institute of Architects
28. Inspection evidence and concealed work
Inspection records should identify the location, observed condition, relevant criterion and outstanding action. Plan verification while important work remains visible. Photographs can support a record but cannot establish unseen construction or performance that requires other evidence.
Worked example: Before a ceiling closes, the team records relevant service penetrations and requests outstanding installation evidence. An unresolved item remains open rather than being treated as verified by a general room photograph.
Mistake to avoid: Accepting a completed appearance as proof that concealed assemblies satisfy their specified requirements.
Reference: The Hong Kong Institute of Architects
Construction and environmental performance
29. Continuous structural load paths
A load path describes how forces pass through connected elements to the ground. Architectural changes can alter that path even when individual components remain intact. Coordinate openings, transfers and connections with structural assessment; identifying a plausible load path is not a structural design calculation.
Worked example: A facade support appears to bear on a slab edge, but the proposed detail omits its connection. The architect identifies the missing transfer and coordinates it with the structural engineer.
Mistake to avoid: Checking component sizes while ignoring how forces cross the connections between them.
Reference: The Hong Kong Institute of Architects
30. Ground conditions and foundation uncertainty
Foundation choices depend on ground conditions, loads, groundwater and nearby structures. Treat preliminary assumptions as uncertainties requiring investigation and specialist interpretation. Similar neighboring buildings provide context, but their foundations do not prove that the same solution suits a different site or loading arrangement.
Worked example: A feasibility scheme assumes uniform bearing conditions. Investigation identifies variable strata, so the foundation concept and associated basement assumptions are reassessed before the design advances.
Mistake to avoid: Selecting a foundation type solely because it was used on the adjoining property.
Reference: The Hong Kong Institute of Architects
31. Movement accommodation
Structures and finishes move because of temperature, moisture, loading and material behavior. Details must accommodate expected relative movement while preserving required weather, fire and acoustic performance. The position of a movement joint needs coordination across layers rather than treatment as an isolated line.
Worked example: A structural joint runs beneath a continuous tiled finish. The detail is revised to provide an appropriate movement provision through the finish instead of expecting the tiles to bridge the movement.
Mistake to avoid: Allowing a rigid finish or service connection to unintentionally restrain a designed movement joint.
Reference: The Hong Kong Institute of Architects
32. Rain control through layered detailing
Effective envelope design manages water through shedding, drainage and continuity of protective layers. Consider joints, terminations and interfaces where rain can enter or become trapped. A sealant joint may be one component of the strategy, but its condition and eventual replacement must be considered.
Worked example: A window head detail sheds surface water but leaves no clear drainage path behind the outer layer. The team coordinates drainage and continuity with the surrounding facade system.
Mistake to avoid: Expecting a single exposed sealant line to resolve every water-management function.
Reference: The Hong Kong Institute of Architects
33. Condensation and surface temperature
Condensation can occur when moist air encounters a surface below its dew-point temperature. Diagnose the moisture source, surface temperature and air movement before choosing a response. In humid conditions, cooled surfaces and uncontrolled air leakage deserve attention alongside insulation and ventilation.
Worked example: Water forms on a chilled service enclosure during humid weather. Investigation links the wetting to condensation, so the team reviews insulation continuity and air leakage instead of assuming a rain leak.
Mistake to avoid: Treating every damp patch as evidence that external waterproofing has failed.
Reference: The Hong Kong Institute of Architects
34. Thermal bridges at junctions
A thermal bridge is a local path of greater heat transfer through an otherwise better-insulated envelope. It can increase energy demand and create colder internal surfaces under cooling or heating conditions. Review junctions and penetrations, because average wall performance may conceal a significant local weakness.
Worked example: Continuous insulation stops at a projecting metal connection. The team reviews the connection and surrounding assembly with specialists to reduce unwanted heat transfer while maintaining structural requirements.
Mistake to avoid: Assuming good insulation across most of a wall resolves every junction.
Reference: The Hong Kong Institute of Architects
35. Glazing, shading and competing performance goals
Glazing decisions balance daylight, solar gain, glare, views and envelope performance. External shading effectiveness depends on sun direction and geometry; a device effective on one orientation may perform differently on another. Compare alternatives under consistent conditions rather than selecting by appearance alone.
Worked example: A deep horizontal overhang controls high-angle sun but leaves low-angle afternoon glare unresolved. The team evaluates additional orientation-appropriate measures without assuming the overhang solves every solar condition.
Mistake to avoid: Copying one shading detail onto all elevations without testing its function.
Reference: The Hong Kong Institute of Architects
36. Acoustic flanking paths
Sound can reach an adjoining space through indirect paths as well as directly through a partition. Floors, ceilings, junctions, doors and service openings may limit the performance of the complete enclosure. Identify the source, transmission paths and receiving conditions before specifying an isolated improvement.
Worked example: A meeting-room partition is upgraded, but conversations remain audible through a shared ceiling void. The solution addresses that flanking path rather than adding another layer to the partition alone.
Mistake to avoid: Equating a partition's laboratory rating with the performance of the completed room.
Reference: The Hong Kong Institute of Architects
37. Ventilation and pollutant sources
Ventilation design should respond to occupant demand and identifiable pollutant sources. Source reduction, separation and appropriate extraction can complement dilution with outdoor air. Air movement within a room does not necessarily provide fresh air or remove pollutants, so distinguish circulation from ventilation.
Worked example: A printing room produces odors that spread into adjacent offices. The team reviews source location and suitable extraction with the services designer instead of simply adding circulation fans.
Mistake to avoid: Assuming stronger internal airflow automatically improves outdoor-air provision.
Reference: The Hong Kong Institute of Architects
38. Falls and drainage coordination
A fall expresses vertical change over horizontal distance. Check the available depth, outlet location, thresholds and construction tolerances together. Correct arithmetic establishes geometry only; the assembly and drainage system still need appropriate design and verification against applicable requirements.
Worked example: An illustrative surface falls 1 in 80 over 4 metres. The required drop is 4 ÷ 80 = 0.05 metres, or 50 millimetres, which must fit the proposed build-up.
Mistake to avoid: Calculating a fall without checking whether the outlet and adjacent levels accommodate it.
Reference: The Hong Kong Institute of Architects
39. Material compatibility and durability
Durability depends on exposure, material interactions, detailing and maintenance. Compatible materials in one environment may behave differently under persistent moisture or contaminants. Assess interfaces, protective measures and access for replacement rather than relying only on the expected life of each separate product.
Worked example: A metal fixing contacts a different metal in an exposed facade assembly. The team evaluates corrosion risk and an appropriate separation detail with the system supplier.
Mistake to avoid: Assuming individually durable products necessarily form a durable assembly.
Reference: The Hong Kong Institute of Architects
40. Buildability and accumulated tolerances
Buildability includes the physical ability to install, adjust, inspect and maintain an assembly. Multiple tolerances can accumulate at an interface, making a nominally fitting detail impractical. Coordinate adjustable connections and installation space without assuming every component will arrive at its ideal dimension.
Worked example: A prefabricated panel has only 5 millimetres of clearance beside a structure with an illustrative positional tolerance of 10 millimetres. The interface needs revision because the available clearance is insufficient.
Mistake to avoid: Detailing to exact nominal dimensions without allowing for real construction variation.
Reference: The Hong Kong Institute of Architects
Procurement and contract administration
41. The brief and appointment scope
A project brief describes required outcomes; an appointment defines the services and responsibilities commissioned to help achieve them. Translate broad expectations into identifiable deliverables, exclusions and interfaces. Confirm changes rather than assuming that every client request falls within the original service arrangement.
Worked example: A client requests a detailed interior package after commissioning only base-building design. The architect identifies the additional deliverables and resolves their service arrangements before undertaking that package.
Mistake to avoid: Treating an expanding brief as an automatically expanded appointment.
Reference: The Hong Kong Institute of Architects
42. Procurement and allocation of responsibility
Procurement decisions distribute design, construction, coordination and commercial responsibilities. Compare options against the project's priorities and the actual proposed agreements. Labels alone do not establish who carries a particular risk; examine responsibility, control and the ability to manage that risk.
Worked example: A client seeks an early construction commitment while design remains incomplete. The team examines who will develop the remaining design and how changes will be valued before recommending an arrangement.
Mistake to avoid: Assuming a procurement route eliminates uncertainty simply by transferring responsibility on paper.
Reference: The Hong Kong Institute of Architects
43. Resolving inconsistent contract information
Drawings, specifications and schedules must be read together under the applicable contract. When information conflicts, follow the contractual process for clarification rather than inventing a universal order of precedence. Resolve the design intention and document the clarification before it becomes an uncontrolled site assumption.
Worked example: A drawing shows one door finish while the schedule lists another. The inconsistency is referred through the agreed process, and the clarified requirement is formally recorded.
Mistake to avoid: Assuming drawings always override specifications, or the reverse, without checking the contract.
Reference: The Hong Kong Institute of Architects
44. Equal treatment during tender clarification
Tender comparisons require a reasonably consistent information basis. Material clarifications that affect price or scope should be communicated through the agreed tender procedure. Distinguish confidential bidder information from changes to the employer's requirements, and maintain records of what information was issued.
Worked example: One bidder asks whether a costly facade test is required. The clarified requirement is issued to all bidders through the tender procedure so each can price the same obligation.
Mistake to avoid: Giving one bidder a material scope clarification while comparing its price with uninformed bids.
Reference: The Hong Kong Institute of Architects
45. Normalizing tender comparisons
The lowest submitted total may exclude work included elsewhere. Compare scope, qualifications and assumptions before judging price. A normalized comparison adjusts known differences transparently; it does not remove uncertainty or authorize acceptance without checking the tender conditions and outstanding qualifications.
Worked example: Bid A is HK$9.8 million but excludes testing estimated at HK$0.4 million. Bid B includes it at HK$10.0 million. A's illustrative adjusted total is HK$10.2 million, making B lower on that basis.
Mistake to avoid: Ranking tenders by headline totals while ignoring explicit exclusions.
Reference: The Hong Kong Institute of Architects
46. Programme dependencies and the critical path
A programme links activities through dependencies. The critical path determines the earliest completion under the stated logic and durations. Delay to a noncritical activity may consume available float without delaying completion; contractual entitlement remains a separate question requiring the applicable terms and evidence.
Worked example: One sequence takes 3 + 5 = 8 weeks; an independent parallel sequence takes 6 weeks. The first governs completion. Extending the parallel sequence to 7 weeks does not change the 8-week finish.
Mistake to avoid: Assuming every delayed activity causes an equal delay to project completion.
Reference: The Hong Kong Institute of Architects
47. Authority and formal instructions
A request, technical discussion and contractual instruction can have different consequences. Establish who may issue instructions and how the contract requires them to be communicated. Record decisions through that process so the contractor and employer can understand their scope, timing and possible commercial effects.
Worked example: A user asks a contractor to relocate a partition. The architect refers the request through the authorized change procedure instead of treating the conversation as an approved instruction.
Mistake to avoid: Assuming any project participant can bind the parties by asking for a change.
Reference: The Hong Kong Institute of Architects
48. Variation measurement and valuation
Separate whether work is a change from how that change should be valued. Use the applicable contract's valuation mechanism and verify quantities, rates and omissions. A change may involve additions and deductions, so its net effect is not necessarily the price of the added work alone.
Worked example: A change adds work valued at HK$24,000 and omits work valued at HK$9,000. Its illustrative net addition is HK$15,000 before any further adjustments required by the contract.
Mistake to avoid: Valuing added work while forgetting the corresponding omitted work.
Reference: The Hong Kong Institute of Architects
49. Cumulative progress-payment calculations
A progress assessment may be cumulative, so the current amount is derived from the assessed total and relevant previous amounts. Apply retention and other adjustments only as the contract requires. Keep valuation, certification and actual payment records distinct to avoid subtracting the wrong figure.
Worked example: Assessed cumulative work is HK$800,000. An illustrative 5% retention gives HK$760,000; subtracting HK$500,000 previously certified produces HK$260,000 for the current assessment, before other adjustments.
Mistake to avoid: Using an assumed retention rule or confusing previous payments with previous certificates.
Reference: The Hong Kong Institute of Architects
50. Completion against contractual criteria
Completion is assessed against the contract's criteria and the state of the works, including relevant testing and information. Physical appearance alone does not resolve whether an essential function is ready. Distinguish contract completion from statutory permissions and operational readiness, even where they interact.
Worked example: Rooms appear finished, but a required system test remains unresolved. The team checks its significance under the completion criteria instead of treating decoration as sufficient evidence.
Mistake to avoid: Assuming a visually finished building necessarily satisfies every condition for completion or occupation.
Reference: The Hong Kong Institute of Architects
51. Defect identification and causal investigation
A defect record should identify the observed departure from the requirement before assigning responsibility or selecting a remedy. Similar symptoms can have different causes. Review design, materials, installation and use with relevant specialists, then follow the contract's process for correction and verification.
Worked example: Water staining appears below a terrace. Investigation finds a blocked drainage route rather than the initially suspected membrane failure, so the remedial response addresses the established cause.
Mistake to avoid: Prescribing a remedy solely from the visible symptom without investigating the mechanism.
Reference: The Hong Kong Institute of Architects
52. Claims, records and dispute pathways
A claim needs a contractual basis, relevant facts and a supported account of its consequences. Contemporaneous records help distinguish an event from the effect alleged. Follow the applicable notice and dispute procedures; do not import deadlines, remedies or authority from a different contract.
Worked example: A late-information claim includes dated requests, issue records and programme analysis. These establish when information was needed and whether its late issue affected the claimed activities.
Mistake to avoid: Assuming evidence that an event occurred also proves the whole claimed delay or cost.
Reference: The Hong Kong Institute of Architects
Practice management and project information
53. Resource capacity and realistic delivery
Compare required effort with available productive time, including coordination and review. Staff availability is not the same as uninterrupted production capacity. Resolve a shortfall by adjusting resources, deliverables or timing rather than relying on a programme that exceeds the team's capacity.
Worked example: A package needs 180 hours. Three staff each have 20 project hours available that week, providing 60 hours weekly. The package therefore needs three weeks under those assumptions.
Mistake to avoid: Counting every paid hour as available project production time.
Reference: The Hong Kong Institute of Architects
54. Fee budgets and remaining effort
Monitor the cost of providing services against the agreed fee and forecast remaining effort. Distinguish revenue from margin, and use internal cost assumptions consistently. Early identification of a forecast overrun allows the practice to investigate scope, efficiency and resource decisions.
Worked example: A HK$120,000 fee has HK$75,000 of recorded delivery costs and HK$30,000 forecast remaining costs. The projected margin is HK$15,000 before any costs excluded from that estimate.
Mistake to avoid: Treating the unspent portion of a fee as profit without allowing for remaining work.
Reference: The Hong Kong Institute of Architects
55. Cost plans, allowances and contingency
A cost plan expresses the estimated cost of a defined scope at a stated stage. Allowances and contingency should have identifiable purposes rather than concealing omissions. Explain what is included, what remains uncertain and how design changes affect the forecast.
Worked example: An illustrative HK$20 million base estimate receives a 7.5% contingency of HK$1.5 million, producing HK$21.5 million. Fees and other excluded items still require separate allowance.
Mistake to avoid: Assuming contingency automatically covers every item missing from the estimate's stated scope.
Reference: The Hong Kong Institute of Architects
56. Revision and issue status
Project information needs an identifiable revision, purpose of issue and distribution record. A later revision may supersede an earlier one without being authorized for every use. Make status clear so recipients know whether information supports discussion, coordination or the specified next action.
Worked example: A revised plan is issued for coordination while the construction issue remains unchanged. The register records both statuses, preventing the coordination drawing from being mistaken for a construction instruction.
Mistake to avoid: Assuming the newest file is automatically the correct document for every task.
Reference: The Hong Kong Institute of Architects
57. Quality checks and independent review
Quality assurance plans how work will be produced and checked; quality control examines particular outputs. Effective review tests assumptions, interfaces and requirements as well as drafting accuracy. Match the reviewer's competence to the decision and record how material comments are resolved.
Worked example: A colleague checks an entrance detail against levels, access and envelope interfaces. The review finds a threshold conflict that a check limited to linework and dimensions would have missed.
Mistake to avoid: Calling a drawing checked when only its formatting has been reviewed.
Reference: The Hong Kong Institute of Architects
58. Consultant interfaces and responsibility boundaries
An interface matrix identifies who designs, supplies information, reviews and coordinates each shared condition. Boundaries should connect responsibilities without leaving gaps or creating conflicting assumptions. Coordination requires resolving the combined result, not merely collecting separate consultant submissions.
Worked example: A ceiling zone involves architecture, structure and building services. The matrix assigns clearance information, support design and overall spatial coordination so the final arrangement fits and remains maintainable.
Mistake to avoid: Assuming an interface is covered because several consultants each mention it in their scope.
Reference: The Hong Kong Institute of Architects
59. Risk priorities and response ownership
Describe a risk as an uncertain event with a consequence, then identify its cause, response and owner. Likelihood and impact help prioritize attention, but simple rankings do not replace judgment about severe consequences or dependencies. Review risks as information changes.
Worked example: An unverified utility location could force entrance redesign. The project assigns an owner to obtain reliable information early and reviews the entrance decision after the uncertainty is reduced.
Mistake to avoid: Listing vague concerns without an action, responsible person or point for reassessment.
Reference: The Hong Kong Institute of Architects
60. Handover information and future operation
Handover information should help the operator understand installed systems, maintenance needs and outstanding issues. Check that records reflect completed conditions and that required documents are usable and identifiable. A large document collection is not useful if its contents conflict or omit essential operational information.
Worked example: A maintenance manual describes equipment that was replaced during construction. The team obtains the correct records and links them to the installed asset schedule before accepting the information package.
Mistake to avoid: Equating the volume of handover documents with their accuracy or usefulness.
Reference: The Hong Kong Institute of Architects
Sources
Reference context:
All study guides