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Presented in the paper is MES (manufacturing execution system) architecture, which is suitable for managing FMS (flexible manufacturing system) lines under an ERP (enterprise planning system)environment. An IDEF0-model of an 'order handling' shop floor having an FMS line is developed to identify functional requirements of MES, and then a two-tier MES architecture satisfying the functional requirements is proposed. The proposed MES is composed of a Main-MES (for the main shop floor) and an FMS-MES (for the FMS line). A BOP (bill of processes) is used as a means to represent process plans, and a LS-Net (loading schedule network) is used as a mechanism for representing and manipulating loading schedules. Object models of BOP and LS-Net are presented, and the effectiveness of the proposed MES is demonstrated by applying it to two FMS lines, a stamping-die machining line and a mechanical part machining line.
Choi et al. (Tue,) studied this question.