Posted on April 14, 2010 by


There are a variety of methods that project managers can incorporate to estimate how much effort is needed to complete project activities in order to develop the project schedule. PROxy-Based Estimating (PROBE) is a software estimation technique used by software engineers that was developed by Watts Humphrey as a component of the Personal Software Process (PSP). PROBE uses historical data to develop an estimate of program size and effort. Information is recorded on the amount of effort it takes to develop units of software such as a type of screen or file. This data is organized into tables categorized by type and size of code. These tables are called relative size tables. This information is later used to estimate the effort it will take to develop similar application components. Conveniently, even in the early requirements gathering stages, one can often gain a good idea of what components will be needed.