Line hierarchy

This example describes a production line with a simple line hierarchy. As a material flows through three cost centers in production, the production line was split into three line segments. In the system, one work center is created for each line segment. Two takts are assigned to each line segment. This means that a material produced on this production line must flow through a total of 6 takts. The production line does not contain any sort buffers. Therefore, the sequence of the planned orders cannot be changed in the production line.

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Takt times and production rates

A maximum production rate of 6 pieces per hour is specified for the production line. Therefore, when the production line is at maximum speed (planned production rate = 6 pieces per hour), a material arrives at the production line at takt 1 every 10 minutes. Similarly, a material leaves the production line at takt 6 every 10 minutes.

In this example, the maximum production rate is used as the basis for takt-based scheduling. This means that the speed of the production line is constant and a material can be processed for 10 minutes in each takt.

To adjust production to the number of orders in the current period, a planned production rate of only 3 pieces per hour is specified for this period. Therefore, one takt is always missed out and only every 20 minutes is a material placed on the production line at takt 1 or leaves the production line at takt 6. The lead time of the order increases if production is interrupted due to either a break or a shift change.

See also:

Takt-based scheduling

Visualization in the Sequence Schedule (Planning View)

As there are no sort buffers in the line hierarchy, only one row is displayed in the sequence schedule for the complete production line. The view of the sequence schedule is set to the line-on view. Therefore, the sequence schedule displays when the planned orders in segment 1 arrive at the production line (production start date).