What is the outside-view duration from comparable completed work?
Open →Practical lens pack
Product & Project Decision Lens Pack
A compact review for estimates, pivots, roadmaps, launches and stopping rules.
Use it when
A short review before a large conclusion.
- estimating delivery
- deciding whether to pivot
- prioritising a roadmap
- continuing a weak project
- reviewing a launch
Five lenses
Questions worth asking before you commit.
Would we fund the next step if the project arrived today with no history?
Open →Which costs, failure modes or adoption barriers are missing from the exciting story?
Open →Which failed projects are absent from the examples we are copying?
Open →Did this work because the process was good, or because uncertainty happened to favour us?
Open →10-minute workflow
Turn awareness into an action.
Use with AI
Ask the model to challenge the frame, not decorate it.
Prompt: “Review this decision without choosing for me. Restate my criteria, show the strongest case against my preferred option, identify missing evidence, flag possible anchors or sunk costs, and finish with the smallest next test that would reduce uncertainty.”
The goal is not forced disagreement. It is to make assumptions, alternatives and evidence visible before the recommendation feels inevitable.