HKIA/ARB PA Paper 5 common mistakes
HKIA/ARB PA Paper 5 · Understand the traps and how to avoid them.
In the case-study scenario questions, answering with a generic description of what a competent architect would normally do, instead of identifying the specific issue embedded in the facts given (e.g. a party who acted outside their authority, a notice served late, a drawing revision that was never formally issued).
Candidates treat case-study items as invitations to display general professional knowledge, because that is how university-style questions are usually answered. They skim the scenario for keywords and then write a textbook answer, missing that the marks are allocated to the particular facts, dates, parties and sequence given in the stem.
What to do instead
Before writing, annotate the stem: underline every party, date, document reference and action in sequence. Then state explicitly which fact creates the problem and which rule or contractual provision it engages. Practise by taking past scenario stems and, without answering, listing the three or four 'hooks' the examiner planted. Train yourself to open each answer by naming the specific defect in the scenario, not the general principle.
Ignoring the sequence of events in a case study and treating simultaneous or out-of-order obligations as if they occurred in the order the candidate finds convenient, for example assuming a contractor's notice was valid because the underlying event was genuine, without checking whether the notice was given within the stipulated period.
Under time pressure, candidates reconstruct the scenario from memory in logical rather than chronological order. Time-bar and notice provisions are the most heavily tested points in construction contracts, precisely because they are procedural, yet candidates focus on substantive merits (who was actually at fault) and skip the procedural step.
What to do instead
Build a one-line timeline on the answer sheet before writing anything: date, party, action, document. Mark any period stated in the contract (notice periods, payment periods, response times) and test each against the timeline. Where the question turns on validity of a notice or claim, structure the answer as: event, notice given, time limit, compliance or non-compliance, consequence.
Confusing the roles and authorities of the parties in the building process, for example describing the Authorized Person as if they were the registered structural engineer, or attributing to the Building Authority a power that actually sits with the Building Authority's delegate or with the Fire Services Department, or treating the 'supervising officer' concept from the standard form as identical to the Authorized Person under the Buildings Ordinance.
The Hong Kong regulatory system has overlapping roles across the Buildings Ordinance, the subsidiary regulations, and the standard forms of contract. Candidates learn these in separate silos and then blend them under exam pressure, especially where the same individual may hold more than one registration.
What to do instead
Make a one-page role matrix: for each role (Authorized Person, Registered Structural Engineer, Registered Geotechnical Engineer, Registered Contractor, Supervising Officer, Contract Administrator, Building Authority, Fire Services Department), list the statutory basis, what they may sign or certify, and what they cannot do. Redo it from memory weekly until the boundaries are automatic.
Answering contract questions by quoting a clause number or a standard form name without explaining its legal effect, or conversely explaining the general law without linking it to the specific form and clause actually used on the project described.
Candidates memorise clause numbers as a shortcut to looking knowledgeable, but examiners award marks for the consequence of the clause: entitlement, notice, payment, extension of time, loss and expense, determination. Conversely, candidates who know the general law often fail to anchor it to the contract because they have not learned which standard forms are common in Hong Kong and how they differ.
What to do instead
For every contract answer, write the effect in a fixed sentence pattern: 'Under [clause/form], [party] is entitled/obliged to [action] within [period], and if not, [consequence].' Learn the main differences between the common Hong Kong forms on time, payment, variations, and determination, and be able to state which form applies and why the difference matters.
Treating sustainability as a list of technologies (photovoltaics, green roofs, rainwater harvesting) rather than as a performance question, so answers never quantify, never compare options, and never connect the measure to the specific climate, site, building type or assessment credit that the question asks about.
Sustainability is often taught as an awareness topic rather than a design-analysis topic, and candidates default to enumerating measures. They also avoid numbers because they are unsure of them, which removes the comparative reasoning that earns the higher marks.
What to do instead
Answer sustainability questions in a performance frame: what is the objective, what are the candidate measures, what is the trade-off, what is the metric, what is the decision. Learn the structure and credit categories of the building environmental assessment method used in Hong Kong, and be ready to state which credit a measure contributes to and what evidence would demonstrate it.
Giving building technology answers that describe a system's components but not its failure modes, interfaces, or coordination requirements, so a question about, say, a curtain wall or a transfer structure is answered with a catalogue of parts rather than an account of how loads, movement, water, fire and tolerances are managed at the interfaces.
Candidates revise from descriptive summaries and diagrams rather than from first principles of load path, movement joint, drainage and fire compartmentation. Interface problems are the ones that actually cause defects, but they are harder to write about than components.
What to do instead
For each major system, prepare a one-page sheet covering: load or service path, movement and tolerance, water and air control, fire and smoke control, key interfaces with other trades, common defects and their causes. Practise answering by tracing the path from source to discharge and naming what happens at each interface.
Managing the exam as a single pass: spending disproportionate time on early questions, then writing rushed bullet points on the high-value case study, or leaving a whole question unanswered because it was attempted last.
Case-study and essay items carry more marks per minute of writing but feel slower to start, so candidates warm up on short items and lose the time budget. Many candidates also have no per-question time allocation and discover the overrun only at the end.
What to do instead
Set a written time budget before the paper: minutes per mark, with a hard stop per question, and reserve time for review. Practise full papers under timed conditions at least three times, and rehearse the discipline of abandoning an overlong answer mid-sentence to protect later marks. If a question is genuinely unknown, still write the structure and the rule you do know rather than leaving a blank.
Writing answers with no structure: a single dense paragraph that mixes the legal position, the practical recommendation and the candidate's opinion, so the examiner cannot locate the marks.
Candidates write as they think, and under time pressure the drafting discipline disappears. Many have never been shown what a high-scoring answer looks like at this level, where marks are allocated to identifiable points.
What to do instead
Adopt a fixed skeleton for every answer: issue, rule or provision, application to the facts, conclusion or recommendation. Use short labelled paragraphs or numbered points. Practise by rewriting your own past answers into this skeleton and counting how many distinct markable points each contains.
Confusing project management tools with project management outcomes: describing a critical path method, a programme or a risk register in the abstract, without saying what decision it drives, who acts on it, or what happens when the programme or register shows a problem.
Candidates learn techniques as definitions, and examiners ask about consequences. Time, cost, quality and risk are also treated as separate topics rather than as a linked system, so candidates miss questions that require showing how a delay event flows into an extension of time, then into cost, then into the final account.
What to do instead
For each technique, learn the decision it supports and the action that follows: who reviews it, how often, what triggers a revision, and what the contractual consequence is. Practise tracing a single delay event through programme impact, notice, extension of time, prolongation cost and final account, since that chain is the most commonly examined integration point.
Relying on vague or outdated regulatory knowledge, for example citing a repealed or amended provision, or asserting a submission or consent requirement without knowing which authority grants it and what the current procedure is, and presenting it with false confidence instead of flagging uncertainty.
The statutory and administrative framework in Hong Kong changes, and candidates revise from older notes or second-hand summaries. Because the material feels authoritative, candidates do not verify it, and an incorrect provision is penalised more heavily than a cautious, correctly framed answer.
What to do instead
Revise from current primary sources: the Buildings Ordinance and its subsidiary regulations, current practice notes and the relevant government department guidance, checked against the version in force. Build a table of submissions, approvals and consents with the authority, the applicant and the statutory basis. In the exam, where you are unsure, state the principle confidently and qualify the detail rather than inventing a provision.