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Apparatus and a method for controlling the release of jobs from a pool of pending jobs into a factory

  • US 4,956,784 A
  • Filed: 12/14/1988
  • Issued: 09/11/1990
  • Est. Priority Date: 12/14/1988
  • Status: Expired due to Fees
First Claim
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1. A method for controlling the release of jobs from a pool of pending jobs into a factory including a plurality of machines processing jobs-in-progress, said method comprising the steps of:

  • providing a job release scheduler for controlling release of a job from the pool of pending jobs into the factory, said job release scheduler having inputs connected to the machines and other components of the factory relating to an amount of time required to process a job in the factory and an amount of time anticipated to complete the job within the factory including waiting time at the machines;

    calculating a continuity index (CI) for one of the jobs in said pool of pending jobs, said continuity index being related to the total amount of processing time required by said one of said pending jobs, and the anticipated time to complete said one of said pending jobs;

    calculating a mean continuity index (MCI) related to an operational parameter of said factory according to management objectives for processing and completing a job in said factory;

    calculating a lower range (r1) and an upper range (r2) related to said management objectives; and

    operating said job release scheduler for releasing said one of said jobs into said factory if;

    
    
    space="preserve" listing-type="equation">MCI-r1<

    CI<

    MCI+r2.

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