Use this tab to view or change scheduling settings. When using the Simulation Client, Advanced Planning Board or Maintenance Planning Board (MPB), you can change these settings. However, the changes you make in this window are not saved in the database and are only valid until all orders are reloaded. When using the Scheduling Client, you can only view the settings.
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When using CBS/APB for manufacturing this window contains:
The Schedule Settings area:
Scheduling Horizon: The time horizon during which work is scheduled. Any work that does not fit into this time span is not scheduled. A short scheduling horizon limits the amount of time that the Scheduler must consider for scheduling and enables it to generate schedules more quickly. However, it is important that the scheduling horizon be long enough to allow for the scheduling of all work that needs to be performed.
Earliest Possible Start Time Offset: A specified amount of time that can be used to adjust the current time or locked current time. This adjustment affects the calculation of the earliest possible start time (EPST). The EPST is the date and time before which no work, whether new or rescheduled, can be scheduled. Although the EPST offset can be positive or negative, it is usually positive. This creates a time buffer that prevents an operation from being scheduled exactly at the current time. In practical terms, an immediately scheduled operation cannot start instantaneously on the shop floor. An offset of at least a few hours, if not days, allows time to implement the schedule.
Adjustment Factor Weight: The amount of weight used for the prioritization of shop orders and operations in the schedule. This weight increases or decreases the importance of the date compared to the other factors that are considered in the scheduling of operations. If no value is specified, the default value of 1 is used. The formula for calculating the adjusted date is: Original date + [Adjustment factor weight * (1 Adjustment factor/100)]
Sequencing Horizon: The default time span set for selecting orders for part characteristic sequencing. This time span is used by the Sequencing Assistant.
Transport Calendar: The calendar that is used when scheduling any transport time that is allocated for an operation.
The Current Times area:
Current Time: The current time maintained in the scheduling application based on the system clock. The current timeline in the Gantt chart is updated every minute to reflect the current time.
Locked Current Time: If desired, enter a fixed start date and time in this field to override the current time. If this field is left blank, the system uses the current time as the basis for scheduling. Setting a locked time prevents the current timeline from being updated every minute in the Gantt chart. It can also be useful in the Simulation Client or Scheduling Client, where you can experiment with previous schedules. If you loaded a schedule that was done last week, for example, all the planned operations would be in the past, i.e., before the current date. If you tried to reschedule them, they would be shifted forward to the current time. If you wanted to experiment to see whether the schedule could have been done differently, you could first set the date and time to the beginning of last week. This would allow schedules to be generated starting at that time and date (adjusted by the earliest possible start time offset, as explained above).
Use Part Number Only: If this option is selected, the system, during scheduling, looks at the previous part that was produced at a given resource. If this part is the same as the one the next operation is scheduled to produce, the second operation does not require setup.
Use Part Number and Operation Name: If this option is selected, the system, during scheduling, looks at both the previous part and the previous operation. If the previous part is the same as the next one but the operation is different, a setup time is added to the next operation. However, if both the part and the operation are the same, a setup time is not added for the second operation.
No Setup Optimization: If this option is selected, the system, during scheduling, adds the setup time for each operation that requires setup, even if the previous part produced at a given resource is the same.
When using MPB for maintenance this window contains:
The Schedule Settings area:
Scheduling Horizon: The time horizon during which work is scheduled. Any work that does not fit into this time span is not scheduled. A short scheduling horizon limits the amount of time that the Scheduler must consider for scheduling and enables it to generate schedules more quickly. However, it is important that the scheduling horizon be long enough to allow for the scheduling of all work that needs to be performed.
Scheduling Startpoint Offset: A specified amount of time that can be used to adjust the current time or locked current time. This adjustment affects the calculation of the earliest possible time to schedule a task/operation. This is then the date and time before which no work, whether new or rescheduled, can be scheduled. This creates a time buffer that prevents a task/operation from being scheduled exactly at the current time.
The Current Times area:
Current Time: The current time maintained in the scheduling application based on the system clock. The current timeline in the Gantt chart is updated every minute to reflect the current time.
Locked Current Time: If desired, enter a fixed start date and time in this field to override the current time. If this field is left blank, the system uses the current time as the basis for scheduling. Setting a locked time prevents the current timeline from being updated every minute in the Gantt chart. It can also be useful in the Simulation Client or Scheduling Client, where you can experiment with previous schedules. If you loaded a schedule that was done last week, for example, all the planned operations would be in the past, i.e., before the current date. If you tried to reschedule them, they would be shifted forward to the current time. If you wanted to experiment to see whether the schedule could have been done differently, you could first set the date and time to the beginning of last week. This would allow schedules to be generated starting at that time and date (adjusted by the scheduling startpoint offset, as explained above).