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Hello and welcome to the second part of our software engineering course. In the

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previous mini-course, we discussed some basic principles

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behind software engineering. We provided an overview of

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several software process models and we introduced

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some important tools that can help developers

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increase their productivity. In this mini-course, we

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will focus on requirement and prototyping. More precisely,

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we will discuss in depth requirements

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engineering activities. We will also discuss

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techniques to perform a system analysis

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and design in an object-oriented fashion. So,

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let's start the first lesson of this mini-course, which is about the use

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of engineering techniques to understand and

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specify the purpose of a software system.