Executing Sequencing 

Purpose

You can use this process in Repetitive Manufacturing for the operative planning for production. Using Sequencing, you can sequence planned orders and at the same time carry out takt-based scheduling. Here, you can plan the sequence manually or you can use an automated process such as the first-in-first-out process.

Prerequisites

Process flow

  1. Accessing the Sequence Schedule

Access the sequence schedule. In the initial screen, enter the plant and the production lines you want to plan. Also specify a period of examination for planning.
  1. The system reads the following data for the period of examination of the sequence schedule:
    1. The system determines the operating time of the production lines or of the buffered sections by reading the available shift data from the scheduling capacities.
    2. The system determines the master data of the production lines from Line Design, such as the takt times and the number of takts.
    3. The system determines the materials for which it is to dispatch planned orders. To do this, it determines the production versions in which the production lines in question are entered.
  1. Sequencing

The system determines all planned orders that lie in the period of examination and then determines the order sequence per planning period. You define the planning process (for example the FIFO process) in Customizing for Sequencing or in the line hierarchy.
  1. Takt-based scheduling

Once the system has sequenced the planned orders, it then carries out takt-based scheduling to calculate the precise production start and finish dates. The system dispatches the planned orders as early as possible.
  1. The dispatched orders are displayed graphically in the sequence schedule.

Depending on the dispatching procedure and load, the system displays the planned orders either in the Sequence schedule section of the screen or in section of the screen entitled Orders not yet dispatched.
  1. Dispatching, Deallocating and Rescheduling Manually

You can change the results of planning by manually dispatching, reallocating or deallocating planned orders on one production line or to another production line.
  1. Changing the Operative Rate/Takt Time

You can overrule the planned production rate for one period in the short-term by specifying an operative production rate - for a shift, for example.
  1. Now you can carry out the following functions:
    1. You can search by lines, line segments or orders.
    2. You can display the line hierarchy to check the takt times, for example or to Select Line Segments.
    3. You can display the production line to check the operating time load, for example.
    4. You can display or change detailed data for a planned order such as the material availability or the order quantity for example.
    5. You can display the sales order for a planned order.
    6. You can print a list of the planned orders or the graphic sequence schedule.
    7. You can display configuration data for a configured material.
    8. You can display the components of a planned order.
  1. Changing the Planning Settings

From the sequence schedule, you can also select a different processing profile or you can change the planning period.
  1. Changing the Visualization Settings

If necessary, from the sequence schedule, you can change the visualization of the order characteristics or you can change the settings of the coordinates axes of the sequence schedule.
  1. Accessing the Control View

You can access the control view which displays exactly where the planned orders are situated on the production line at a particular time.

Result

You have carried out sequencing and takt-based scheduling for repetitive manufacturing. When you leave the sequence schedule, the system saves the production dates of the planned orders.

When you access the sequence schedule again, the system re-reads all master data and transaction data (line hierarchy, production rates/takt times, planned orders and so on). This guarantees that planning is always based on current data.