Browsing by Author "Hsu, HP"

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An activity-based predicate/transition net model of operational control planning for a flexible manufacturing system
(2004-04-01)
Hsu, HP
;
Chen, JY
;
Su, CT
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
An effective flexible manufacturing system (FMS) relies on a hierarchy of decisions, including the control of the FMS operation. The FMS operation usually is dynamically constrained by the limited resources such as pallets, machines, tools, carts, etc. Most analytical models make many assumptions and oversimplify the complicated decision problems. This study proposes the predicate/transition (Pr/Tr) net, a high level petri net, as a model for operational control planning. Firstly, the activities (modes) and their resources usage in FMS were analysed and aggregated into activity sets. Then, the flow of parts among activities was traced to obtain the "mode transition diagram", and then the Pr/Tr net model was introduced. We incrementally defined the predicates and transitions into this model. Finally, a comprehensive FMS Pr/Tr net model was derived. By implementing it into a rule-based simulation model, it is well suited for FMS operational control planning because of its inclusiveness and high flexibility.
The implementation of an activity-based costing collaborative planning system for semiconductor backend production
(2005-06-15)
Hsu, HP
;
Su, CT
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
While the market turns to an environment with low profit margins for semiconductor backend operations, it is hard for an independent. firm to survive today. Forming strategic alliances or integrating an enterprise's internal. firms by means of collaborative planning/operations to gain competitive advantage is inevitable. This paper presents the development of an activity-based costing collaborative production planning system (ABC/CPPS) to help production planners to estimate the manufacturing profit of semiconductor backend turnkey (combined IC assembly and testing) operational services at the early stage of order release to production line in a collaborative context. The estimation is under the real constraints of production resources. A predicate/transition net (Pr/Tr net) is used to simulate and implement the activity-based costing (ABC) model with the dynamic characteristics of a production line incorporated. A financial measure, profit, is used to supplement and indicate the consequence of the planning result and link the view to the enterprise's. financial vision.