Bulldozer00's Blog

The figure below shows the derivation of an estimate of work in staff-hours to design/develop/test a Computer Software Configuration Item (CSCI) named YYYY. The estimate is based on the size of an  existing CSCI named XXXX and the productivity numbers assigned to the “Real Time” category of software from the productivity chart in Steve McConnell‘s “Software Estimation: Demystifying the Black Art“.

Of course, the simple equation used to compute effort and all of the variables in it can be challenged, but would it improve the accuracy of the range of estimates?