Software Estimation: Demystifying the Black Art (Best Practices (Microsoft))

Overview

Applicability of Techniques in This Chapter

 

Informal Comparison to Past Projects

Estimation Software Tools

Industry-Average Effort Graphs

ISBSG Method

What's estimated

Effort

Effort

Effort

Effort

Size of project

S M -

S M L

S M -

S M -

Development stage

Early-Middle

Early-Middle

Early

Early

Iterative or sequential

Both

Both

Sequential

Sequential

Accuracy possible

Medium

High

Low-Medium

Low-Medium

Most projects eventually estimate effort directly from a detailed task list. But early in a project, effort estimates are most accurate when computed from size estimates. This chapter describes several means of computing those early estimates.

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