Fuzzy Comprehensive Evaluation for Pipeline Pigging Process

Hierachical analysis method and fuzzy comprehensive evaluation theory are adopted in pipeling pigging comprehensive evaluation, and hierachical analysis model for pipeline pigging is established.and the credibility of evaluation experts are obtained using similarity and diversity calculation method of group evaluation; indexes weight sets and degree of memberships at fuzzy statistics method are calculated and solved based on the credibility of evaluation experts; comprehensive evaluation on pipeline pigging is realized with weighted average's fuzzy composition operator based on set up factor sets, evaluation sets, function of degree of memberships and weight sets.This method considers adequately the diversity between experts and evaluation results are more objective and reliable with universality, meanwhile it can be used to determine optimized one from different pigging programs.