Limit the materials or tools available
Remove access to all but two or three resources and let the constraint force inventive use of what remains.
Why it works
When all tools are available, selection decisions absorb creative energy and default to the familiar and powerful. Limiting to a small set of materials forces the creator to use those materials in unexpected ways — to find functions the materials were not designed for. This is exaptation under constraint: the limited environment produces creative use of existing things rather than procurement of new ones.
How to do it
- Define your constraint before the session: one color, one instrument, one framework, three ingredients.
- Make the constraint genuinely limiting — not merely "fewer options" but "these specific options only."
- Notice when the constraint produces an unexpected use and record it even if you don’t pursue it.
- After the session, ask: what did the constraint force that freedom would have avoided?
Evidence
Experimental studies find that limiting available materials consistently increases creative originality in design and problem-solving tasks. The effect has been replicated across visual design, product design, and writing tasks. (observational)
Most studies use moderate constraints; very severe constraints (only one tool) can shift from creative catalyst to insurmountable obstacle. The benefit requires that some meaningful set of options remain within the constraint.
Sources
- Catrinel Haught-Tromp (2017), green eggs and ham hypothesis — constraints as creative catalysts
- Stokes (2006), Creativity from Constraints, Princeton Architectural Press
Common mistake
Removing so many materials that the constraint becomes a frustration rather than a catalyst — the constraint must leave room for skill to operate within the limit.
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More practices for Deliberate Constraints, Made Practical
- Time-box the creative session
Set a hard end time before you start — the approaching deadline forces decisions that open-ended time never makes.
- Impose a formal constraint on the output
Require the output to fit a specific form — sonnet, one paragraph, single slide — and let the form force creative decisions.
- Narrow the scope: a smaller problem space is a richer one
Restrict the problem to a specific user, use case, or scenario — the narrower the brief, the richer the possible solutions within it.
- Start from the constraint, not the goal
Define the hardest boundary first, then generate within it — rather than generating freely and pruning to the constraint.
- The obvious veto: reject the first three ideas before keeping any
Force yourself to generate more by vetoing the first plausible ideas — they are almost always the most obvious ones.
- Constraint vacation: remove a constraint to see what you’ve been avoiding
Temporarily lift a constraint you’ve accepted as fixed and ask what you would do if it genuinely did not apply.
Related concepts
- Lateral Thinking, Made Practical
De Bono’s system for escaping the grooves of habitual thought
- Divergent Thinking: Generating Many Ideas
Generating quantity, separating ideation from judgment, and why group brainstorming disappoints
- Osborn’s Brainstorming Rules, Made Practical
The original four rules, the mechanisms behind them, and what the research actually shows