Workshop tool
Assumptions matrix
Use this when you have a list of assumptions and need to decide which to address first.
Where it’s used:Step 3: Problem exploration
How to use it
Place your assumptions in the matrix. The horizontal axis runs from no influence on quality or outcome to potential project killer; the vertical axis from easy to address to extremely difficult to address.
Then address your assumptions in this order:
- The easy-to-address potential project killers
- The difficult-to-address potential project killers
- The easy-to-address non-influential assumptions
- The difficult-to-address non-influential assumptions
This order reduces the risk of the project by eliminating potential project killers first, and then picks the low-hanging fruit of the easy assumptions.
Source: START Triple-I project development tool kit, pp. 15–17.