Displaying Segment Schedules

Segment schedules are schedules that indicate when the assembly parts that are required for the work in a particular line segment must be delivered to the shop floor warehouse. For each segment on a line, a range of offline periods is defined. And for each period a date is scheduled on which the assembly parts are required. Therefore, every product variant whose requested offline date falls in one of these periods requires its assembly parts for the segment in question on that date.

The advantage of these schedules is that the assembly part requirements can be determined right from the schedule, if only the requested offline date of the product variant and the segment of the assembly parts is known. Compare this to the following procedure, which you must use if no segment schedules are used:

  1. Determine in which segment a part is required.
  2. Offset that line segment: calculate the time between the start of the segment and the end of the roll-off line.
  3. Calculate the date on which the assembly part is required.
  4. Determine the plan period in which this date falls.
  5. Determine the delivery date of the part, which is the start date of the plan period.

Segment schedules are used for a rough planning of assembly part requirements, especially in the more distant future, that is, the period after the allocation time fence, but before the demand time fence. However, the schedules cover the whole period in the demand time fence, including the allocation time fence.

Note

To prevent that no date can be scheduled for product variants whose requested offline date falls before the first period of a segment, the Planned Offline Date From field of the first period of a segment is empty. As a result, the date scheduled of that period applies for all dates before the Planned Offline Date To.

The fields in the current session must be read as follows:

  • The Planned Offline Date To and the Planned Offline Date From display the periods that are defined for the segments displayed in the Line Segment field.
  • A product variant whose requested offline date falls in this period requires its assembly parts for the segment concerned on the Date Scheduled.
  • These segments occur on the displayed Assembly Line. This assembly line is a feeding line to the displayed Roll-off Line if the codes of these lines differ. If the codes are equal, the Assembly Line is itself the Roll-off Line.
Important!

The Calculate Assembly Part Requirements (tiapl2221m000) session must use the most up-to-date schedule. Therefore, that session automatically updates the segments if a change is detected that affects the schedules. However, not all changes can be detected automatically. In some cases, the schedule must be updated manually, either through the Update command on the appropriate menu of the current session, or by selecting the Update Segment Schedules check box in the Calculate Assembly Part Requirements (tiapl2221m000) session.

The schedules must be updated manually when:

  • The line structure is changed.
  • The plan period definition of the current scenario is changed, while the reference date is not changed.

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