Principle
Stop buying certainty that cannot change the choice
Research can become a very respectable form of postponement.
When it fits
- Analysis is expanding after the preferred action has become robust to the remaining uncertainty.
When to avoid it
- Information may have value beyond the current decision—compliance, safety, learning or future decisions—so do not discard it solely because current VOI is low.
Why it matters
Compare the likely benefit of better information with its cost, delay and opportunity cost. If even perfect information about the remaining uncertainty would not change the action, stop collecting it for this decision. If information could change the choice, target the specific uncertainty with the highest leverage rather than researching everything.
An example
Do not postpone a reversible pilot to refine a forecast whose entire plausible range still supports running the pilot.
Check your result
Every remaining research task has a named decision it could change or another explicit purpose.
Keep this limit in mind
- Information may have value beyond the current decision—compliance, safety, learning or future decisions—so do not discard it solely because current VOI is low.
Evidence and sources
In decision analysis, perfect information about an uncertainty can have zero decision value when learning it would not change the preferred action.
Zero value in one model may reflect an incomplete objective or option set, so model quality should be checked first.
Perform Probabilistic Analysis and Identify Insights · Value-of-information examples