Weibull distribution
Positive durations where completion or failure likelihood changes with elapsed time.
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Shape previewPositive; the shape parameter controls whether values cluster early or later.
Relative densityDuration (seconds)
- scale
- 6 s
- Use when
- Positive durations where completion or failure likelihood changes with elapsed time.
- Avoid when
- The process is genuinely memoryless; exponential is simpler there.
- Support
- Positive values with no upper bound.
- Parameters
- Shape and scale; shape controls how the event hazard changes with elapsed time.
- Common mistake
- Interpreting every Weibull as an aging failure model; shape below, at, or above 1 implies different hazard behavior.
- Example
- Reliability or task-completion times whose hazard changes as time passes.