Material Requirements

This dialog is used to initiate a process of automatically reconstructing all or part of the schedule to improve its quality and incorporate all recent data updates. These settings are stored separately for each User in order to retain each User's preferences.

Scope Tab

  • Start Optimizing At: Specifies the starting point for the Optimization. Only Activites that start after this time are included in the rescheduling. Other Activities are not affected. If keeping the schedule stable in the short term is important for shop floor logistics or other reasons, then this control can be used for that purpose.
  • Include Unscheduled Jobs: If checked, then Jobs that are New or Unscheduled will be scheduled during the Optimization. If unchecked, then New or Unscheduled Jobs are not scheduled.

Controls Tab

  • Dispatch Rules:Specify which Dispatch Rule(s)to use during the Optimization.
    • Use one Rule for all Resources:Use the Dispatch Rule specified here on all of the Resources during the Optimization. This option can be used to easily experiment with different rules without having to edit each Resource.
    • Use Normal Resource Rules:Use each Resource's 'Normal Dispatcher' during the Optimization. This option is usually used during the daily Optimization process as opposed to for experimentation.
    • Use Experimental Resource Rules:Use each Resource's 'Experimental Dispatcher' during the Optimization. The Experimental Dispatchers provide a means of editing individual Resource rules for experimentation without losing the setting for its 'Normal Dispatcher'.
  • Release Rule:This determines the earliest allowable start date for Jobs rescheduled during the Optimization. Job Release dates are used to prevent work from starting too far in advance of when the products are needed.
    • Regular Job Release Dates: The soonest Jobs are allowed to start is at the Release Dates specified in their Manufacturing Orders.
    • Drum-Buffer-Rope: Release dates are dynamically calculated for each Job so that it is released at the right time to target an arrival at its Drum Resource as late as possible, setback by the Drum's Buffer Span to reduce risk of Drum starvation.
    • JIT Release Date: Release dates for each Job are calculated to target a "Just in Time" completion at the Job's Need Date. The JIT Slack Days can also be set to provide some slack to reduce the chance of Job Lateness. The JIT Slack Days are subtracted from the JIT Start Date of each Operation to determine its earliest allowable start.