Comparison · C48
Choose a decision rule under uncertainty
Which decision method fits the level of uncertainty and reversibility?
Direct answer
The comparison distinguishes thresholds, decision trees, expected value and real options by required data, error cost and ability to reverse.
01Choose a proportionate method and document its limits.
02The rule, the evidence and the next review date stay visible.
How to use this
Move from the question to the deliverable.
Which decision method fits the level of uncertainty and reversibility?
Choose a proportionate method and document its limits.
Four-method comparator
Critical comparison · SQ-51
Compare four decision methods under uncertainty
Sophistication is useful only when it matches available data, the cost of error and decision reversibility.
Critical comparison applied to the choice between a full launch, pilot and deferral.
- 01Qualify
Assess uncertainty, irreversibility, repetition and delay cost.
- 02Compare
Rate methods by required data, transparency and treatment of the option to wait.
- 03Choose
Retain the simplest method that addresses the dominant risk.
- 04Limit
Document what the method ignores and the review date.
Threshold, tree, expected value or real option
A pilot is a real option when it buys information at limited cost; a simple threshold rule is enough for a regulatory condition.
| Method | Data | Reversibility | Uncertainty | Strength | Limit | Selected use |
|---|---|---|---|---|---|---|
| Threshold rule | Low | Irrelevant | Low | Fast and readable | Side effects | Compliance |
| Decision tree | Medium | Partial | Medium | Explicit sequence | Many branches | Conditional go |
| Expected value | High | Low | Quantifiable | Compares consequences | Hides extremes | Allocation |
| Real option | Medium | High | High | Values learning | Difficult estimate | Pilot |
01The compliance no-go uses a binary threshold because the condition cannot be offset.
02The pilot is preferred to the full launch if €30k can resolve uncertainty affecting €400k.
03Expected value is used only when probabilities and impacts have a documented basis.
Methodological comparison. Probabilistic ratings remain sensitive to assumptions and must not create false precision.
Coherence controls
Minimum conditions before validation.
The status, the evidence and the owner must be available for review.
The status, the evidence and the owner must be available for review.
The status, the evidence and the owner must be available for review.
The status, the evidence and the owner must be available for review.
Usable deliverable
Four-method comparator
Explore the decision further with an interactive control, or start from a structured template to produce your deliverable.