Estimate time and effort with an outside view instead of relying only on the current plan.
Open situation →Reasoning Practice · Advanced
One failed project resets every estimate
The previous project missed its date by six months. Managers now double every estimate, even though most comparable projects had much smaller delays.
Your decision
What is the best way to use the recent failure?
Show the best first move
B. Treat it as one observation inside a broader reference class and identify whether the same failure conditions apply.
Why this move helps
The vivid failure deserves inspection, but not automatic dominance. A reference class shows how common that outcome is and whether the same conditions are present.
Evidence still missing
- Frequency of similar delays in comparable work.
- Specific causes of the previous failure.
- Whether those causes exist in the new project.
Evidence note
Availability bias may explain why the recent failure receives extra weight. The failure can still justify a larger estimate when relevant conditions repeat.
Next action
Add the failed project to the reference class and state the conditions that warrant moving toward its outcome.
Best first lens
Availability Heuristic
Use the lens to ask a better question. It does not prove that a person or team has a cognitive bias.
Other defensible lenses
The situation may have more than one explanation.
Continue the path
Situation → skill → technique → action.
You can produce forecasts that are easier to challenge, compare and learn from later.
Build this skill →Use outcomes from comparable completed cases before refining an inside-view plan.
Run the technique →