Part A Describe each phase of the waterfall model in about two to four sentences, in your own words, i.e. do not copy or quote, but paraphrase.

Part B Let us focus on a scenario where, the requirements were thought to have been finalised, but during the design phase it became clear that part of the requirements were wrong. What is wrong with Figure 2.1 "The Waterfall Model" of the text book, and what changes need to be made to that diagram in order to enable a sensible course of action in our scenario.

Part C Explain the advantages of the waterfall method in three to five sentences. Give at least one example where the waterfall model is appropriate.

Part D Summarise the advantages of incremental delivery in about 3 to 5 sentences of your own words. Give at least one example where the waterfall model is inappropriate.

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