Design thinking resource
A strategic tool for identifying and prioritising the assumptions that influence the success of an idea or innovation.
Every concept relies upon assumptions. Teams often make assumptions about users, technologies, markets, behaviours, resources and implementation without recognising them.
Assumption Mapping helps make these beliefs visible so they can be examined, discussed and tested.
Some assumptions have little effect on success, while others represent critical uncertainties. If a high-risk assumption proves incorrect, the entire concept may need to change.
Mapping assumptions according to importance and certainty helps teams focus attention on the areas that matter most.
The purpose of assumption mapping is not simply to identify uncertainty but to reduce it. By testing assumptions through research, experiments and prototypes, teams can gather evidence and improve decision-making.
This process supports learning before significant investments are made.
Put the method to work
Identify the beliefs underlying the concept or opportunity.
Determine which assumptions are essential to success.
Evaluate the level of evidence supporting each assumption.
Focus learning activities on assumptions that are both important and uncertain.
Why it matters
Identify vulnerabilities before significant investment.
Replace opinions with validated learning.
Direct effort toward the most important uncertainties.
Strengthen decision-making through evidence.
Continue exploring
Place this method back within the broader 5E Design Thinking Framework and continue developing your understanding.