A comprehensive design exam paper is usually built from two large parts: the problem statement and the answer sheet. The problem statement itself is not a single block of information. It normally includes written requirements, an area schedule, a bubble diagram, and legends. None of these can be read in isolation. A workable solution comes only when all four are cross-checked against one another.
The part worth dwelling on here is the expansion of the bubble diagram: how to read what is given, how to fill in what is missing, and how not to be trapped by the diagram’s apparent certainty.
One thing should be made clear first: for every exam problem, there is more than one possible answer. “More than one” does not mean any answer is acceptable; it means the standard solution is not the only logically valid arrangement. Looking back at papers from recent years, even published reference solutions can contain imperfections. Some rooms may end up poorly lit, some areas may not match perfectly, and later editions of teaching materials may adjust their model answers.
This is not simply carelessness. These imperfections are also part of the difficulty of the exam. If the basic design logic is weak, it is easy to step into the trap. If the pursuit of perfection is too strong, it is just as easy to spend too much time chasing an ideal scheme and fail to finish the answer. The goal in the exam is not to produce a flawless building. The goal is to produce a design that follows sound principles and remains internally consistent. If the scheme can explain itself logically, it has a chance to pass.
In that sense, the problem setter is playing something like a Sudoku game with the candidate. A Sudoku puzzle removes most of the complete information and leaves only enough clues for the player to infer the final arrangement. The difference is that Sudoku has one correct answer, while a design problem allows several possible solutions. Because of that, the examiner can afford to scatter the information more freely, omit some “secondary” conditions, and hide clues among the written description, the area table, and the bubble diagram.
So what we see in the bubble diagram is never the whole truth. It is a partial clue. The incompleteness of the bubble diagram is exactly what makes the answer non-unique and allows multiple valid schemes to emerge. Completing it tests the designer’s basic skills and design thinking. At the same time, the written requirements and the area schedule prevent the answer from becoming pure self-expression.
Start with the small clues in the bubble diagram
The first question is whether the orientation of the bubble diagram is reliable.
Many people instinctively assume that the position of a bubble is the position of the room. That assumption is risky. The diagram may be correct overall, partially deformed, or only suggestive. Several checks are needed:
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Check the north arrow.
Bubble diagrams are often read as north-up and south-down, but the site plan may not follow that visual habit. The direction of the north arrow must be compared with the apparent orientation of the bubbles. -
Check the entrances and exits.
If the written description says an entrance is on a certain side, the bubble diagram should be tested against that information. A mismatch may mean the diagram has been rotated, simplified, or locally distorted. -
Watch for deformation.
In many cases the general relationship is correct, but a local part has been stretched or compressed for graphic layout. A room that appears to sit in one location may actually only represent a functional relationship. -
Read the circulation between bubbles.
The connecting lines are not decoration. Different connections imply different spatial relationships: parallel connection, serial connection, or a mix of both. These flows often reveal more than the bubble positions themselves.
The second task is to compare the bubble diagram with the written description and the area schedule.
Missing information in the bubble diagram must be recovered from these two sources, especially the area schedule. The area table usually contains the complete room list. On many papers, the number of rooms shown in the bubble diagram is far smaller than the number listed in the area schedule, sometimes less than half. That gap is not an accident; it is the space where the candidate must reason.
The legend is also a locating clue
The legend should not be treated as something to add at the end. Where a legend item belongs may become an important clue in determining room positions.
For example, a long escalator has very different spatial requirements from an ordinary stair or elevator core. It needs more room, it often shapes the circulation route, and it affects the convenience and reasonableness of how people move through the building. In other words, a legend item may not be a small technical label; it may be a key connector in the whole plan.
A practical sequence for expanding the bubble diagram
A useful way to work is to make the bubble diagram less cramped before trying to solve it.
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Copy the given bubble diagram onto a sketch sheet.
Leave more space between bubbles than the original provides. This makes it easier to add rooms, notes, circulation, and corrections. -
Read the written requirements and annotate the known bubbles.
Whenever the text mentions a room connected to an existing bubble, mark it directly on the sketch. Do not rely on memory. -
Add the remaining rooms from the area schedule.
After the clearly related rooms are placed, go back to the area table and mark the rooms that have not yet appeared. The area schedule is the most complete checklist. -
Review the circulation between bubbles.
Recheck the flow relationships: which spaces must connect directly, which can connect through another space, and which should remain separate. Important legend elements should also be placed on the sketch at this stage. -
Infer the positions of missing rooms.
Use function, area, circulation, and site position together. Estimate each room’s approximate size and likely location on the overall plan. Then deform the bubble diagram according to functional zoning and fix each group into its corresponding zone. -
Add stairs, corridors, and other circulation elements where they make sense.
This is also the point where some secondary rooms may need to be sacrificed locally. A scheme that is slightly imperfect but logically controlled is often better than an ideal scheme that cannot be completed. The key is to distinguish the primary conflict from the secondary one. Grasping the main contradiction is the way to break the problem open. -
Move into the formal rough plan.
Once the areas have been translated into a reasonable structural grid, draw the plan sketch on that grid and continue refining from there.
The bubble diagram is not a finished plan in miniature. It is a set of clues with omissions, distortions, and priorities hidden inside it. Reading it well means accepting its incompleteness, using the other parts of the exam paper to repair it, and knowing when a reasonable compromise is better than a perfect-looking dead end.