Assumption
A belief treated as true for planning or decision-making before it is fully verified.
Plain English
Something the plan currently relies on but still may need evidence.
In context
Making assumptions visible lets teams test the highest-risk beliefs and update decisions when evidence changes.
Example
“The estimate assumes the source data already has unique customer identifiers.”
When you'll hear this
- discovery
- planning
- risk review
Common misunderstanding
An assumption is not established fact and hiding it makes plans appear more certain than they are.
Also known as
working assumptionplanning assumption
Commonly used by
Related terms
Updated: 2026-08-27
