Standardizationof such things as parts lists or

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Unformatted text preview: ilar functions, designs and tech nologies should be grouped. Each portion of work should be verifiable. Pieces should map conveniently onto the organizational structure. Some of the functions that are needed throughout the design (such as electrical power) or throughout the organization (such as purchasing) can be centralized. Standardization—of such things as parts lists or reporting formats—is often desirable. The accounting system should follow (not lead) the system architecture. In terms of breadth, partitioning should be done essentially all at once. As with system design choices, alternative parti tioning plans should be considered and compared before implementation. If a requirements-driven design paradigm is used for tile development of the system architecture, it must be applied with care, for the use of "shells" creates a ten dency for the requirements to be treated as inviolable con straints rather than as agents of the objectives. A goal, ob jective or desire should never be made a requirement until its costs. are understood and the buyer is willing to pay for it. The capability to compute the effects of lower -level decisions on the quantified goals should be maintained throughout the partitioning process. That is, there should be a goals flowdown embedded in the requirements allocation process. The process continues with creation of a variety of alternative design concepts at the next level of resolution, construction of models that permit prediction of how well those alternatives will satisfy the quantified goals, and so on. It is imperative that plans for subsequent integration be laid throughout the partitioning. Integration plans include verification and validation activities as a matter of course. Implement the Selected Design Decisions. When the process of successive refinement has proceeded far enough, the next step is to reverse the partitioning process. When applied to the system architecture, this "unwinding" of the process is call...
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