Abstract
Publisher Summary This chapter describes the users versus systems analyst's point of view in the definition phase of industrial DCCS. Insufficiency of configuration management tools often caused large-scale centralized CCS to go wrong. DCCS projects are less sensitive to specification errors as a result of flexible modular design and implementation. The DCCS designer, however, tackles with additional degrees of freedom of functional distribution, interconnection, and coordination of multiple information processing entities, redundancy, software distribution, and control equipment allocation. At the same time, the users' position has little changed and therefore, adequate and timely DCCS definition remains a bottleneck. Answers to this problem are plant-oriented system analysis, and simulation, design of DCCS as an embedded modifiable computer system and computer-aided specification, and prototyping support systems to ease user participation in the design process. DCCS is considered solely as a functional entity of the entire production plant, indifferent to its architecture.
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