To justify a colour or material, quote the line of the brief it answers and explain how the choice meets that need. The reason comes from the client, not from your taste.
This lesson is part of the SPM subjects and learning resources collection for Interior Decoration.
Brief, choice, reason
Write each justification in three parts.
- Brief: the line or need you are answering.
- Choice: the colour or material you selected.
- Reason: how it meets the need.
The word “because” links the choice to the brief. If you cannot point to a line, the choice is unsupported.
Worked example: a fictional study corner
This brief is invented for practice. A student needs a study corner in a small, warm bedroom. The brief says:
- The user is a secondary school student who studies for two to three hours each evening.
- The room is small and gets warm in the afternoon.
- The corner must be easy to clean and stay within a modest budget.
Question (6 marks): Justify your choice of colour and two materials for the study corner.
Taste-based answer: “I chose blue walls because I like blue. I used wood for the desk because it looks nice and a soft chair.”
Nothing here refers to the brief.
Brief-based answer:
- Wall colour: I chose a pale, cool neutral with a muted blue-green accent, because the room is small and light colours reflect more light, making it feel larger, while cool tones suit a student who needs to concentrate.
- Desktop material: I chose a laminate desktop, since the brief asks for an easy-to-clean surface and laminate wipes clean and resists scratches from daily use, at a modest cost.
- Chair cover: I chose a cotton fabric seat, because the room gets warm in the afternoon and cotton is more breathable than a plastic or leather-like covering, which keeps a student comfortable during two to three hours of study.
- Finish: I chose a matte finish on the desktop because a glossy surface reflects lamp light and strains the eyes during evening study.
Each choice answers a specific line of the brief.
A brief-to-choice table
Making the table before you write helps you avoid missing a need.
| Brief line | Choice | Reason |
|---|---|---|
| Small room | Pale walls | Reflect light, feel larger |
| Warm in afternoon | Cotton seat, light colours | Breathable, cooler in look |
| Easy to clean | Laminate desktop | Wipes clean, resists scratches |
| Modest budget | Laminate and paint over solid wood | Lower cost |
| Evening study | Matte finish, cool accent | Less glare, calm mood |
If a line of the brief has no choice next to it, your concept has a gap.
The mistake that costs marks
The slip is using a general reason that fits any room. “Blue is calming” is true, but it does not show that you read the brief.
Try the swap test. If you could paste your reason into a different brief, it is too general. Add a detail from this brief, such as “for a student who studies for two to three hours each evening”.
Being honest about trade-offs
A good answer admits a limit. Laminate is durable and cheap, but it is less natural-looking than solid wood. You can write one sentence: “Laminate was chosen because the brief prioritises easy cleaning and a modest budget over a natural finish.”
Naming a trade-off shows you weighed options, and it often earns a mark.
Check yourself
Using the same brief, justify a desk lamp colour temperature choice in one or two sentences. Choose warm or cool light and tie it to the brief.
Answer
“I chose a cool white desk lamp because the brief says the student studies for two to three hours each evening, and cooler light supports alertness and clear reading. I paired it with a matte desktop so the light does not reflect as glare.”
Any choice is acceptable if it is tied to a quoted line of the brief and includes a reason. A warm-light choice justified by a relaxing evening mood would also earn marks if linked to the brief.
What to study next
Practise numbers next with reading circulation and furniture relationships in a room plan, then review your written justification with the structured-answer self-review tool.
Practical design work stays with your school. If you want a teacher to question your choices with you, see online one-to-one Interior Decoration tuition.