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-1

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-This is the context in which, typically, a pure

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-2

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-waterfall process will work well. Why? Well, because it's a

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-3

-00:00:06,310 --> 00:00:10,160

-context in which requirements are usually well understood. The

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-4

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-domain is well understood, so that kind of system has

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-5

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-been built many times before. And also, it's a

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-6

-00:00:15,900 --> 00:00:19,510

-system in which we don't expect requirements to change dramatically

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-over time. Therefore, a waterfall model, in which we collect

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-8

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-all the requirements at the beginning and then we move

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-9

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-to the subsequent phases might be the most appropriate one. Probably

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-10

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-we don't want to do evolutionary prototyping in the case of

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-11

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-the control system for an airplane. Same thing holds for TDD,

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-12

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-so we want to be a little more rigorous in those cases.