Estimating in Comparison to Past Experience

The simplest method of estimation is to compare the anticipated work to past experience. And we all have experience that we can use. The big question is how relevant is that experience. A secondary question is how clearly do we remember that experience.

We always have experience, of course. We weren’t born developing systems. We’ve tried things, and learned things, from childhood onwards along a path that’s lead us to today’s situation. In all the things we’ve done, there’s something that we can compare with the work we’re facing. (Continued)