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Alpha-Chain Constraints For Process Planning

  • US 20140222492A1
  • Filed: 02/04/2013
  • Published: 08/07/2014
  • Est. Priority Date: 02/04/2013
  • Status: Active Grant
First Claim
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1. A process-planning system comprising:

  • a schedule modeler configured to receive process-related information describing a process for production of a product, the process-related information describing a logical sequence of tasks to produce respective internal products of the process, at least some of the tasks having a precedence relationship whereby the internal product produced by one task is an input utilized or required by another task,wherein the schedule modeler is also configured to construct a schedule for the process based on the process-related information, the process schedule being for execution of at least some of the tasks each of which utilizes or requires one or more inputs including temporally at least a last input, the schedule modeler including;

    a task separator configured to separate each of at least some of the respective tasks into a closure portion that requires availability of the last input of its task before being initiated, and a distinct precursor portion capable of being initiated before the respective last input is available; and

    a scheduler constructor configured to temporally sequence the closure portions of the respective tasks without intervening precursor portions, and prepend the precursor portions to respective, temporally-sequenced closure portions.

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