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+1
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+In this case, I think about the spiral model,
+
+2
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+and evolutionary prototyping model will work. Definitely you don't want to
+
+3
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+have a pure water from water. Why? Well because it
+
+4
+00:00:09,110 --> 00:00:11,940
+is very expensive with a pure waterfall model to make
+
+5
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+changes during the course of the project, especially changes
+
+6
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+that involve requirements. Why? Because we saw that it can
+
+7
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+be very expensive. Whereas with the spiral model, we saw
+
+8
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+that being iterative, we can actually make correction throughout development.
+
+9
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+Similarly, with evolutionary prototyping, we keep evolving our system
+
+10
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+based on the customer feedback. And therefore, if something changes,
+
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+we will get feedback right away, and we will
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+12
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+be able to adapt. So the key thing here is
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+13
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+that anything that is iterative works better in the
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+case of changing environments. So, situations in which your requirements,
+
+15
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+the situation, the project might change. Whereas waterfall is
+
+16
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+more appropriate for situations in which the requirements are stable,
+
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+we know the domain, and possibly we also know the technologies involved.