1. The analysis effort and programming methods both rest on the principle of extrapolating the total development effort from detailed estimates of one phase of the project. Describe the approach taken in each of these methods and show in what circumstances each might best be employed.

2. The Delphi technique aims to achieve a consensus estimate from the efforts of a number of estimators. How is this achieved and what is the advantage of the Delphi technique over, for example, a round-table discussion?