Abstract
Abstract This study optimizes service composition on the basis of task requirements to solve the problem of multitask corresponding multi-service selection. First, the basic path structure and the implementation steps of cloud manufacturing (CMfg) service composition are analyzed, and service composition is divided into four patterns. Second, the quality of service (QoS) index system of service composition is proposed by combining the six goals of time, composability, quality, usability, reliability, and cost; the calculation expressions of QoS under different composition structures are listed; and the mathematical model of CMfg service composition is established. Then, the weight of each index value in QoS evaluation is determined using an improved fuzzy comprehensive evaluation method. Finally, the optimal selection scheme of service composition is proposed by using gray relational analysis method(GM), and the validity of the optimal selection scheme is verified by an example of mold manufacturing.
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