Research on Complexity Evaluation of Complex Products and Systems Based on Fuzzy Comprehensive Evaluation Method

High complexity is the typical characteristic of Complex products and systems (CoPS). Complexity increases risk of CoPS research, and complexity is the key factor which results in failure of CoPS research. Evaluation to CoPS complexity makes researchers find the complex grades of all parts so that researchers take more time focus on the key parts. On the basis of internal structure and external characteristic of CoPS research, from the perspective of system the article sets evaluation index system of CoPS complexity which include external environment complexity, technology intensive, and organization complexity. Fuzzy comprehensive evaluation method is used to evaluate its complexity. According to the evaluation results, enterprise can reduce the management risk as much as possible. We hope to provide beneficial help for the CoPS development practice.