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So what happens, exactly, within an iteration? In

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almost every iteration, developers perform the following activities.

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So they identify which pieces of functionality this

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iteration will develop, will implement. After doing that, they

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will create a design, for the considered use

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cases, and they will do that guided by the

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chosen architecture. So the set of use cases

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plus the architectural guidelines will result in a design

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for the selected use cases. Once the design is defined,

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then the developers will implement the design, which will result

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in a set of software components. They will then verify

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the components against the use cases to make sure that the

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components satisfy the use cases, they suitably realize the use

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cases. And they will do that through testing or some

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other verification and validation activity. Finally, after verifying that the

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code actually implements the use cases, they will release a product,

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which also represent the end of the iteration. And notice that

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what I put here is an icon for the world,

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in double quotes. Because in many cases the release will be

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just an internal release or maybe a release that will just

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go to some of the stakeholders so that they can provide

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feedback on that. Okay. So it doesn't have to be an

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external release. It doesn't have to be a release to the

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world. But it is, nevertheless, a release of a software product. .