Question
Ask what perfect information could change
Information has decision value only through a choice it can improve.
When it fits
- The team wants more research, testing or analysis before deciding.
When to avoid it
- A simple qualitative check is not a formal expected-value-of-information calculation and can miss rare high-consequence branches.
A question to ask
If this uncertainty vanished completely, could the preferred action change? · Which outcome of the new information would change the choice? · How much better could that revised choice be? · Is there a cheaper decision or option that reduces the need for the information?
Why it matters
Imagine learning the uncertain fact perfectly before you decide. Would you ever choose a different action? If not, the information has little or no value for this decision. If yes, identify the branches where it changes the action and use that to estimate how much effort better information may deserve.
An example
If every plausible server-load estimate still leads to the same architecture choice, another week of load forecasting may add little decision value.
Check your result
The requested information is linked to a specific possible change in action or is deprioritized.
Keep this limit in mind
- A simple qualitative check is not a formal expected-value-of-information calculation and can miss rare high-consequence branches.
Connected ideas
Use beforeStop buying certainty that cannot change the choice
Evidence and sources
Value-of-information analysis compares the value of a decision made with additional information against the value of deciding without it.
Formal value-of-information calculations require a coherent decision model and probability assumptions.
Fifty years of decision analysis in operational research: A review · Value of information