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Foundations of Software and System Performance Engineering: Process, Performance Modeling, Requirements, Testing, Scalability, and Practice by André B. Bondi

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Chapter 2. Performance Metrics

In this chapter we explore the following topics:

• The essential role and desirable properties of performance metrics

• The distinction between metrics based on sample statistics and metrics based on time averaging

• The need for performance metrics to inform us about the problem domain, and how they occur in different types of systems

• Desirable properties of performance metrics

2.1 General

It is essential to describe the performance of a system in terms that are commonly understood and unambiguously defined. Performance should be defined in terms that aid the understanding of the system from both engineering and business perspectives. A great deal of time can be wasted because of ambiguities in quantitative ...

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