How to Diagnose Plan Output Using Order Attributes and the Gantt Chart

Here we have some details that show you how you can diagnose a plan output. You can view the order attributes referenced in this table from within the Supplies and Demands table or the Gantt Chart.

Data Conditions

Inference

  • Need by Date < Earliest Start Date

  • (Need by Date - Earliest Start Date) < Lead Time

The supply is on the critical path of demands that are within the lead time. In this case, the supply is planned to start on its earliest start date to minimize demand lateness.

  • (Need by Date - Earliest Start Date) > Lead Time

  • Suggested Due Date < Need by Date

You can move the supply to an earlier time by pulling it in to start on or after the material available date without impacting upstream feeding supplies.

You can also pull in the supply to start on or after the earliest start date without impacting the lead time of any of the upstream supplies. However, the upstream supplies should be re-pegged or rescheduled to ensure that projected available balance of the upstream materials remain greater than or equal to zero.

  • (Need by Date - Earliest Start Date) > Lead Time

  • Suggested Due Date < Consumption Start Date

You can move the supply to a later time by pushing it out to end on or before the consumption start date. This action doesn't impact any of the downstream consuming supplies and end demands.

You can also push out the supply to complete on or before the need-by date without impacting the lead time of any of the downstream supplies. However, the downstream supplies might need to be rescheduled or re-pegged to ensure that projected available balance stays at or above zero.

Contributes to Overload order attribute is Yes for some supplies in the pegging tree of an end demand

You can filter the list of supplies in the pegging tree in the Supplies and Demands table to only show those supplies that have the Contributes to Overload order attribute set to Yes. This filtering helps you to quickly understand the items that need action to make the plan feasible.