Operations of Production Systems

Operation of Production Systems

Description
Grant Support
Personnel
Papers and Talks

Description


In the wake of recent global competition and pressures to reduce cycle-time, factories need to not only be well designed but should also be planned and scheduled for efficient production. Industrial production histories indicate that it is not uncommon for most parts spend about 80-90% of their time waiting in buffers/queues for machines or material handling equipment, and usually only a small 5-10% of their time on the shop-floor in actual machining. This is largely attributed to inefficient production planning and scheduling decisions.

Just In Time Production of Multi-Level Assemblies: This research is has produced a class of finite capacity Just-In-Time production planning/scheduling methods for assembled products in a batch manufacturing environment (similar to MRP, but CAPACITATED!). Integrated lot-sizing and scheduling has been researched. Simultaneous scheduling of material handling transporters (such as Automatic Guided Vehicles or AGVs) and manufacturing equipment (such as machines and workcenters) has also been researched. The benefit of integration has been demonstrated.
Performance Evaluation and Modeling: Modeling and analysis of complex manufacturing systems and other discrete-event systems could be costly, both in computational and developmental terms. Efficient gradient estimation methods for sensitivity analysis and optimization via simulation has been an area of interest.

Production Planning, Management and Control of a production system subject to random events are challenging problems. A multi-layer hierarchical approach to tactical and aggregate production planning problems was developed, wherein the architecture is strongly dependent on the specific physical system, applicable controls and the complexity of the decision making problem at hand. This work is mostly summarized in two book chapters and several conference papers.

Grant Support


Personnel


Doctoral Students

MS Students

 

Papers and Talks


Papers:

Journal Papers:

Conference Papers (Full Paper Reviewed):

Conference Papers (Full Paper, Abstract Reviewed):

Conference Presentations: