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Proxy-Based Estimating is an estimating process used in the Personal Software Process to estimate size and effort.
Proxy Based Estimating , is the estimation method introduced by Watts Humphrey as part of thePersonal Software Process.
PROBE is based on the idea that if an engineer is building a component similar to one they built previously, then it will take about the same effort as it did in the past.
In the PROBE method, individual engineers use a database to keep track of the size andeffort of all of the work that they do, developing a history of the effort they have put intotheir past projects, broken into individual components. Each component in the database isassigned a type and a size. When a new project must be estimated, it is broken down into tasks that correspondto these types and sizes. A formula based on linear regression is used to calculatethe estimate for each task.