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Rapid Development: Taming Wild Software Schedules by Steve McConnell

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Chapter 8. Estimation

Contents

8.1 The Software-Estimation Story

8.2 Estimation-Process Overview

8.3 Size Estimation

8.4 Effort Estimation

8.5 Schedule Estimation

8.6 Ballpark Schedule Estimates

8.7 Estimate Refinement

Related Topics

Scheduling: Chapter 9

Measurement: Chapter 26

50/50 scheduling: Odds of Completing on Time

SOME ESTIMATES ARE CREATED CAREFULLY, and others are created by seat-of-the-pants guesses. Most projects overshoot their estimated schedules by anywhere from 25 to 100 percent, but a few organizations have achieved schedule-prediction accuracies to within 10 percent, and 5 percent is not unheard of (Jones 1994).

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An accurate schedule estimate ...

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