Defining Sequence Parameters for Line Segments

These are important remix/sequence parameters:

• Local

  • Number of Local Runs

    The number of times LN carries out a calculation to determine the best sequence in the line segment.

  • Local Maximum Swap Distance

    The maximum number of positions between orders that you swap in the Simulate and Create Line Sequences (tiasl4200m000) session. If you increase the swap distance, the quality improves because more swaps are possible. If you increase the swap distance, each sequencing simulation run takes longer.

  • Local Run Count

    The maximum number of attempted swaps per sequencing run. LN checks to see whether this number has been exceeded after each series of swaps, determined by the maximum swap difference and number of orders. When the value of this field has been exceeded, one sequencing run has been completed.

  • Local Non-improvement Count

    The number of times that LN swaps orders in the selected segment without any improvement to the cost before stopping the sequencing run.

• Global

  • Number of Global Runs

    The number of times LN carries out a calculation to determine the best sequence order in the line segment. In the Remix Line Mix (tiasl3220m000) session, this parameter is taken into consideration to determine the number of times the process of remixing must be carried out to arrive at a better line mix.

  • Global Maximum Swap Distance

    The maximum number of positions between orders that you swap in the Simulate and Create Line Sequences (tiasl4200m000) session. If you increase the swap distance, the quality improves because more swaps are possible. If you increase the swap distance, each sequencing simulation run takes longer.

  • Global Run Count

    The maximum number of attempted swaps per sequencing run. LN checks to see whether this number has been exceeded after each series of swaps, determined by the maximum swap difference and number of orders. When the value of this field has been exceeded, one sequencing run has been completed.

    In the Remix Line Mix (tiasl3220m000) session, this parameter is taken into consideration. The parameter represents the maximum number of attempted swaps per reximing run.

  • Global Non-improvement Count

    The number of times that LN swaps orders in the selected segment without any improvement to the cost before stopping the sequencing run.

    In the Remix Line Mix (tiasl3220m000) session, this parameter is taken into consideration. This parameter represents the number of times the orders are swapped in the selected segment without any improvement to the cost before stopping the remixing run.

To define sequence parameters for line segments, complete the steps below.

1. Click Remix/Sequence Parameters on the appropriate menu of the Line Segments (tiasl1540m000) session. The Remix/Sequence Parameters (tiasl4110m000) session starts.

   You cannot start this session from the menu browser.

2. Check that you are logged as a user. Only the user who runs the sequencing engine can select the sequence parameters that are defined by the same user. Select New on the toolbar to enter sequence parameters for the line segment.

The following are sequencing options available in the Simulate and Create Line Sequences (tiasl4200m000) session:

• Local Improvement
  If this check box is selected, LN optimizes the sequence for the segment selected in the Pivot Segment field. You can select the Neighbor Checking check box to optimize the sequence for a segment.
• Neighbor Checking
  If this check box is selected, LN takes account of the segments immediately before and after the specified segments during the optimization process. This process gives rise to a sequence that is translatable to the neighbor segments, which means that the sequence changes are feasible. You can select this check box only if the Local Improvement check box is selected. If the Global Improvement check box is selected, LN automatically selects the Neighbor Checking check box.
• Global Improvement
  If this check box is selected, LN optimizes the sequence for all the segments that you select in this session.

The following are offsetting options available in the Simulate and Create Line Sequences (tiasl4200m000) session:

• Backlog
  If this check box is selected, LN takes a backlog into account when it calculates offset. Therefore, the first order is planned at the beginning of the period you specify in this session.
• Actual Times
  If this check box is selected, LN calculates the offset. LN takes into account when the last order was reported completed on the last line station of a segment. Next time you run this session to replan a line sequence, LN takes the difference between the planned end time and actual end time into account.