PP/DS Optimizer u2013 Planning for HALB and FERT in sequence with Optimizer

[Former Member]

We are using PP/DS optimizer to plan the two level BOM items. FERT and HALB planned orders are converted from SNP. ROH products are not planned in APO. PPDS is not used to create or delete orders. Only scheduling is done by optimizer. Only one mode exists in PDS. Setup matrix is used for both HALB and FERT.

The requirement is to schedule HALB products in time on their own resources in time for multiple FERT orders. The optimizer does not appear to do this consistently. We use the following steps in planning run:

1. Stage numbering.

2. Schedule orders at the earliest with infinite planning. This is done to ensure there are no blank spaces at the beginning of the planning interval on resources after optimization. The result is all orders starting at the same time with multiple loading on resources.

3. Optimization with weightage for makespan and setup time. Key settings are: Forward planning, finite resource loading, pegging relevance, considering inter order relationships. All HALB and FERT resources are selected in this step. (Delays are not important within the Optimization interval and there are no stocks of HALB except when there are time gaps between HALB Orders and FERT orders. HALB order is finished earier than FERT order start.)

The question is: Is Optimizer capable of scheduling HALB and FERT on their own resources but at the right iner order timings while optimizing the setup time. Are there any key setting to watch out for in Optimization profile or Strategy profile to enable this?

If this is not possible, we will have optimize only at one BOM level and then use top down or bottom up heuristics to plan the other level.

[Former Member]

Thanks. We tried simultaneous planning of all resources and it seems to work with multiple orders. The optimizer does take into account the HALB and FERT inter-relationship. The right strategy settings and master needs to be set upfront.

[Former Member]

HI TemYogi,

Assumptions:

1. One PDS each for HALB & FERT level with one resource

2. HALB to be scheduled first. Based on HALB schedule, FERT has to be scheduled

To achieve this

Maintain "Maximum Lateness of a Receipt" in Pegging tab in Demand tab in Product master

in FERT PDS maintain the consumption type of HALB components as continious/ start/end of the the operation

use the planning direction as backward and reverse in DS strategy profile

Use schedule mode as Insert operation / insert operation and close gaps until end in DS strategy profile

Fix all the previous run orders in DS board for HALB and then Schedule all the HALB orders considering u r setups through optimization

Now run the optimizer for FERT

Regards

Sravan maturu

+91 9392602314