Estimation Techniques - Proxy Based Estimation
- Basing an estimate on a relationship between a proxy for the size of the project and the historical record of how long it has taken to complete projects of similar size
- Size Metrics
- Lines of Code
- Function Points
- Objects
- Views/Pages
- Bottom Up Estimation
- Estimating the time it will take to complete a project by combining estimates from the tasks required to complete it.
- Corrects for variance in individual estimates
- Requires extensive low level specification to create the low level estimates
- Subject to error from missed tasks, unless a correction factor is applied
- Story Points- a purely relative metric based on comparative effort
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