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+Let's now put together all that we have discussed
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+and see how a requirements engineering process actually works.
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+So, first of all, we saw that requirements engineering
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+consists of three main steps. Elicitation of the requirements,
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+in which we extract requirements from various sources. Modeling
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+in which we represent the requirements using one or
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+more notations or formal reasons and analysis, in which
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+we identify possible issues with our requirements and there is
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+actually a 4th step that we kind of mention
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+but not explicitly. And this is the negotiation that can
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+happen between the stakeholders and the developers, during which
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+requirements are discussed and modified until an agreement is reached.
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+So if you want to think of this as a
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+process, so as a sequence of steps, we can see
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+that we start from elicitation. So we start by eliciting
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+an initial setup requirements. We negotiate and refine this set,
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+then we model the resulting requirements. And finally, we
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+analyze such requirements. However, the process doesn't really stop here.
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+Why? Well, because as a result of the analysis,
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+we might have to perform further elicitation. And so this
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+process is not really a sequential one, but rather
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+an iterative process. So, in practice, we continue to iterate
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+over these four steps gathering a better and better understanding
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+of the requirements at every iteration until we are happy
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+with the settle requirement that we gather and stop the process.