Phases of the Lifetime

The breakdown and analysis of the lifetime components are important in the study of the changes in the costs and benefits of the system throughout its lifetime. The life span of a system can be divided into several different phases. The division of the system life into phases is mainly done for the purpose of separating the costs and the benefits that are associated with the phases. The beginning and end of these phases are not always well defined, and the phases sometimes slightly overlap. Nevertheless, an attempt to separate and define these phases will help the analysis and modeling of the lifetime.

The major phases of a typical system life with their cost profile are shown in Fig. 10.1. The relative ratios of the costs in Fig. 10.1 are gross generalizations. They are estimated from the experience of the author and the values given in the published literature. It is quite obvious that the actual values depend on the particular system under consideration. The non-recurring costs and the total units produced make the ratios case dependent. Some other costs, such as the cost of proj ect management, marketing, and warranty, etc., are spread over the total life of the system. These are called general and administration (G & A) costs and overhead. They are embedded in the cost of each phase as an added percentage.

Cost

Conceptual Design & Dev.

DesigjvEngjiecrng Prototyping & Test

Conceptual Design & Dev.

DesigjvEngjiecrng Prototyping & Test

Fig. 10.1
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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