Category: estimating

  • Remotivating data analysed for another purpose

    The motivation for fitting a regression model has a major impact on the model created. Some of the motivations include: practicing software developers/managers wanting to use information from previous work to help solve a current problem, researchers wanting to get their work published seeks to build a regression model that show they have discovered something […]

  • Putnam’s software equation debunked

    The implementation of a project has a lifecycle that starts and finishes with zero people working on it. Between starting and finishing, the number of staff quickly grows to a peak before slowly declining. In a series of very hard to obtain papers during the early 1960s (chapter 5), Peter Norden created a large project […]

  • Modelling estimate/actual including uncertainty in the estimate

    What is an effective technique for modelling the relationship between the time estimated to implement a task and the actual time taken to implement that task? A regression model is the obvious approach. However, an important assumption made by the commonly used regression techniques is not met by estimate/actual project data The commonly used regression […]