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As we just heard from Professor Bohem, software

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engineering is an important and critical discipline, concerned

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with cost effective software development. We also heard

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that this is based on a systematic approach

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that uses appropriate tools and techniques, operates under

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specific development constraints. And most importantly, follows a

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process. As we discussed in the previous lesson,

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the software development process contains fundamental activities, or phases.

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Since we will discuss several processes, I'm going to remind

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you what these phases are. We start with requirements

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engineering, followed by design,

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implementation, verification and validation, and

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finally maintenance. Note that we will revisit each of

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these phases and devote an entire lesson or more

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to each phase. So what I want to do next

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is simply to give you a quick overview of

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what these phases are. Note also that for now

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I will follow a very traditional take on these topics. Later on in the

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class we will see how things can change and did change over the years.