Advanced planning and scheduling
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Advanced planning and scheduling (also referred to as APS and advanced manufacturing) refers to a manufacturing management process by which raw materials and production capacity are optimally allocated to meet demand. APS is especially well-suited to environments where simpler planning methods cannot adequately address complex trade-offs between competing priorities. Production scheduling is intrinsically very difficult due to the (approximately) factorial dependence of the size of the solution space on the number of items/products to be manufactured.
Traditional planning and scheduling systems (such as Manufacturing resource planning) utilize a stepwise procedure to allocate material and production capacity. This approach is simple but cumbersome, and does not readily adapt to changes in demand, resource capacity or material availability. Materials and capacity are planned separately, and many systems do not consider limited material availability or capacity constraints. Thus, this approach often results in plans that cannot be executed. However, despite attempts to shift to the new system, attempts have not always been successful, which has called for the combination of management philosophy with manufacturing.
Unlike previous systems, APS simultaneously plans and schedules production based on available materials, labor and plant capacity. APS has commonly been applied where one or more of the following conditions are present:
- Make-To-Order (as distinct from make-to-stock) manufacturing
- capital-intensive production processes, where plant capacity is constrained
- products 'competing' for plant capacity: where many different products are produced in each facility
- products that require a large number of components or manufacturing tasks
- production necessitates frequent schedule changes which cannot be predicted before the event
Advanced Planning & Scheduling software enables manufacturing scheduling and advanced scheduling optimization within these environments.
- Enterprise planning systems
- Enterprise resource planning
- Manufacturing resource planning
- Master Production Schedule
- Scheduling (production processes)
- http://www.mjc2.com/production-scheduling-complexity.htm Why is production planning hard?
- Wagoner, April (2007). Plant Floor Scheduling Systems in a Lean Environment. Raleigh: NCSU.
- Mike Liddell (2008). The Little Blue Book On Scheduling. Palmetto, Florida: Joshua1nine Publishing.
- Günther, Hans-Otto (Ed.): Advanced planning and scheduling solutions in process industry. Berlin: Springer, 2003. - ISBN 3-540-00222-7
- Kevin Ake, John Clemons, and Mark Cubine: Information Technology for Manufacturing: Reducing Costs and Expanding Capabilities. November 24, 2003 by CRC Press - ISBN/ID: 1574443593