An order adaptive discrete-part manufacturing system (OADMS) is a system that satisfies orders rapidly and flexibly in make-to-order manufacturing environments. A manufacturing execution system (MES) is an industrial software system, as well as a manufacturing management function, that aims to optimize production activities from order launch to finished goods. This thesis presents 1) an architecture of MES for OADMS, 2) MES workflow models used in the former architecture, and 3) extensions of the architecture and workflow models.
This study develops a functional business process (FBP) model for OADMS to identify the functional requirements of MES, and then proposes an order-adaptive MES architecture that satisfies the functional requirements. BOP (bill of process) and LS-Net (loading schedule network) are the MES workflow models used and to be used in developing order-adaptive MES software systems. A BOP model represents the BOM (bill of material) structure and production processes, whereas an LS-Net model represents the entire loading status of an OADMS by linking together individual BOP models via resources. This study also uses an object-oriented modeling technique for developing formal object models of BOP and LS-Net. The proposed architecture and workflow models are extended to manage OADMS that include FMS lines under an ERP (enterprise resource planning) environment. Specifically, this study proposes the extended MES, which consists of a Main-MES (for the main shop floor) and an FMS-MES (for the FMS line), and extends the MES workflow models (BOP and LS-Net) to represent FMS operations.
This study shows the effectiveness of the proposed MES architecture and MES workflow models by successfully applying the developed MES software systems, which are designed based on the above, in OADMS through out Korea.
