Where We Are in the Product Development Life Cycle

Estimating the size and reuse potential of software occurs during the early stages of project planning. In terms of our generic life cycle model, planning takes place during the concept exploration, system exploration, and requirements phases (see Figure 10-1). Estimating size and effort will occur many times during the life cycle, increasing confidence with each occurrence—after initial customer requirements, after analysis, after design, and so on. Our process model describing the phases of the life cycle (see Chapter 4, "Selecting Software Development Life Cycles") serves us well in indicating where estimates and re-estimates should occur. A good practice for project managers is to require size estimates and re-estimates as exit criteria from each phase.

Figure 10-1. Software Size and Reuse Estimation Occurs at the Beginning of the Life Cycle

Figure 10-1. Software Size and Reuse Estimation Occurs at the Beginning of the Life Cycle

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Project Management Made Easy

Project Management Made Easy

What you need to know about… Project Management Made Easy! Project management consists of more than just a large building project and can encompass small projects as well. No matter what the size of your project, you need to have some sort of project management. How you manage your project has everything to do with its outcome.

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