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Information about Scheduling (production Processes)

Scheduling is an important tool for manufacturing and engineering, where it can have a major impact on the productivity of a process. In manufacturing, the purpose of scheduling is to minimize the production time and costs, by telling a production facility what to make, when, with which staff, and on which equipment. Production scheduling aims to maximize the efficiency of the operation and reduce costs. |
Production scheduling tools greatly outperform older manual scheduling methods. This provides the production scheduler with powerful graphical interfaces which can be used to visually optimize real-time work loads in various stages of the production, and pattern recognition allows the software to automatically create scheduling opportunities which might not be apparent without this view into the data. For example, an airline might wish to minimize the number of airport gates required for its aircraft, in order to reduce costs, and scheduling software can allow the planners to see how this can be done, by analyzing time tables, aircraft usage, or the flow of passengers.

Companies use backward and forward scheduling to allocate plant and machinery resources, plan human resources, plan production processes and purchase materials.

Forward scheduling is planning the tasks from the date resources become available to determine the shipping date or the due date.

Backward scheduling is planning the tasks from the due date or required-by date to determine the start date and/or any changes in capacity required.

The benefits of production scheduling include:
  • Process change-over reduction
  • Inventory reduction, leveling
  • Reduced scheduling effort
  • Increased production efficiency
  • Labor load leveling
  • Accurate delivery date quotes
  • Real time information

Scheduling Algorithms

Production scheduling can take a significant amount of computing power if there are a large number of tasks. Therefore a range of short-cut algorithms (Heuristic) (a.k.a. dispatching rules) are used:

References

  • Blazewicz, J., Ecker, K.H., Pesch, E., Schmidt, G. und J. Weglarz, Scheduling Computer and Manufacturing Processes, Berlin (Springer) 2001, ISBN 3-540-41931-4
  • Herrmann, Jeffrey W., editor, 2006, Handbook of Production Scheduling, Springer, New York.
  • McKay, K.N., and Wiers, V.C.S., 2004, Practical Production Control: a Survival Guide for Planners and Schedulers, J. Ross Publishing, Boca Raton, Florida. Co-published with APICS.
  • Pinedo, Michael L. 2005. Planning and Scheduling in Manufacturing and Services, Springer, New York.

See also

External links

Open source solutions

Manufacturing (from Latin manu factura, "making by hand") is the use of tools and labor to make things for use or sale. The term may refer to a vast range of human activity, from handicraft to high tech, but is most commonly applied to industrial production, in which raw
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Engineering is the applied science of acquiring and applying knowledge to design, analysis, and/or construction of works for practical purposes. The American Engineers' Council for Professional Development, also known as ECPD,[1] (later ABET [2]
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For heuristics in computer science, see .


A heuristic is a method for helping in solving of a problem, commonly informal. It is particularly used for a method that often rapidly leads to a solution that is usually reasonably close to the best
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Dispatch is a procedure for assigning employees (workers) or vehicles to customers. Industries that dispatch include taxicabs, couriers, emergency services, as well as home and commercial services such as maid services, plumbing, HVAC, pest control and electricians.
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The introduction to this article provides insufficient context for those unfamiliar with the subject matter.
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The Shifting Bottleneck Heuristic is a procedure intended to minimize the makespan in a job shop. The makespan is defined as the overall time taken to complete a set of multi-machine jobs where machine order is pre-set for each job.
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Timebar scheduling is a method of staff scheduling that may be adopted by organizations with highly variable staff scheduling requirements.

The primary advantage of timebar scheduling is that it makes it visually clear how many employees will be working or on break at any
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