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We have already provided some application-specific elaboration of the idea of functionality, the equivalent of a set of high-level requirements:

We have also provided the outline of a task model that makes clearer the parameters along which detailed understanding of these requirements may vary. In this section, we bring the task model and the high-level requirements statement together to form a detailed statement of requirements that will form the direct basis for testing and reporting.

It should be understood that the following illustrative discussion is at an extremely preliminary stage.