The model
Record the assumptions supporting a decision and the events that would reopen it. Decisions remain valid while those conditions hold. This avoids both endless reconsideration and the equally familiar use of a two-year-old approval to justify a substantially different proposal.
- 01Assumptions
- 02Approval
- 03Change signals
- 04Review
In practice
A supplier choice relied on a particular scope and volume. Both change before contract signature. The team revisits the commercial decision rather than presenting the original slide as a portable source of authority.
