Chapter 19

Tip #85 

Use software tools based on the science of estimation to most accurately compute effort estimates from your size estimates.

Tip #86 

Use industry-average effort graphs to obtain rough effort estimates in the wide part of the Cone of Uncertainty. For larger projects, remember that more powerful estimation techniques are easily cost-justified.

Tip #87 

Use the ISBSG method to compute a rough effort estimate. Combine it with other methods, and look for convergence or spread among the different estimates.

Tip #88 

Not all estimation methods are equal. When looking for convergence or spread among estimates, give more weight to the techniques that tend to produce the most accurate results.