Question:
Hi,
I have a typical situation.Demand from DP is going to MULTIPLE PLANTS.
When SNP planned , finds demand cannot be met as capacity is not enough. how to push this extra demand to another plant using SNP huristics.
Thanks
Sam
Answer:
Hi Sam,
SNP heuristics are meant for infinite planning so by their nature they are not going to allow you to push demand around due to a capacity constraint. If you are wanting to fill up capacity, resource by resource until they are full, you are going to have to look at either CTm or the SNP optimiser.
Good luck
Mark
Answer:
Thanks! we would like do kind of multi site planning where demand can go to next plant in case one plant do not have capacity to produce.This is our constrain and it should be done Automatically.
YOur thougts, CTM or Optimizer
Thanks
sam
Answer:
Hi Sam,
The first time I sent this reply it seemed to fail but you may get it twice.
My thoughts are that you investigate CMT first. CTM works on fulfilling demand based upon priority. It satisfies the entire BOM for the highest priority product before moving on to the next product. If there are products with the same demand priority is given by either alpha numeric order or bu GUID order.
The determination of locations is determined by the procurement priority of the transport lane. Costs I think are taken as the secondary decision point if the priority is common.
As this satisfies the entire BOM you may find that the bottom most component for the lowest priority product is always the one that is left with no supply if you are constrained by capacity. Try looking at
http://help.sap.com/saphelp_apo/helpdata/en/7e/63fc37004d0a1ee10000009b38f8cf/frameset.htm
The SNP optimiser uses relative costs to determine locations, capacities and PPMs. I personally believe that the determination of accurate relative costs is extremely difficult for most companies as intepreting the results and "tweeking" them is a painful and lengthy business.
I have also thought that ATP may also be used, although I have no experience in it. I believe that ATP uses predefined rules such as "Make product A in location 1, if not possible make it in location 2, if not possible substitute with product B from location 1".
You don't have to use the product substitution but please make sure that it tries to satisfy some of the demand before moving onto the next location.
I suggest that you look at: -
a) CTM
b) ATP
c) SNP optimiser
in that order as both CTM and ATP work off hard rules that can be understood. Once the pro's and con's of these have been worked iwth for some time I would suggest that you look at the SNP Optimiser as it's a whole load more complicated.
Good luck and let me know how you get on via a private message if you like.
Mark
Answer:
Once you have released your demand to a plant from dp you have gone along way to determining where you want to make it. You may think about a supply chain model that has a virtual customer location that you release demand to and have transportation lanes connecting that location to your manufacturing locations. you can have snp determine the location.
The optimizer would work well for this with different costs on the transprotation lanes determining your priority.
CTM can also be used. You can create apt subsitution rules and use them in CTM.
remember simpler is better.
George