MRP processing keys

NETCH, NETPL and NEUPL are three fundamentally different ways to schedule your MRP run:

  • NETCH – Net Change Planning
  • NETPL – Net Change Planning within Planning Horizon
  • NEUPL – Regenerative Planning
MRP Processing Keys

MRP Processing Keys

I will elaborate on these three options and their workings:

SAP is keeping track of changes that are relevant for planning a material (like sales order entry, purchase order entry, stock release, etc.). A planning relevant change signals to MRP that the material should run in the next NETCH or NETPL MRP run. MRP will thus only process those materials that underwent some type of planning relevant change. This can decrease processing time of the MRP background run when compared to processing ALL materials.

The difference between NETCH and NETPL is the planning horizon. In NETPL, if a change occurs outside the planning horizon (e.g. a sales order is entered 2 months away and your planning horizon is 6 weeks), then the material is not included in MRP even though there is a change. Be careful with this, because that same sales order is not recognized as a new requirement when it will shift within the planning horizon as we move towards the future.

Regenerative planning (NEUPL) disregards the fact whether or not planning relevant changes were made to the material. It will process ALL materials (with an MRP relevant planning type in the material master’s MRP1 tab).

Another element worth mentioning is the processing indicator. You can use the processing indicator in the stock/requirement list or MRP list to indicate that you checked the material. You can use a filter in the collective access transaction MD06 so you only have to review unprocessed materials (the materials that you didn’t check yet).

MD06 - Processing Indicator

MD06 - Processing Indicator

MD06 Filter Processing Key

MD06 Filter Processing Key

Planning background MRP jobs

Background scheduling of MRP jobs is done through program RMMRP000 (SE38). This screen is similar to transaction MD01 that is used for foreground (on-line) processing. Alternatively to RMMRP000 you can schedule variants through transaction MDBT. I usually plan two MRP jobs for my customers:

  1. Weekly MRP: MRP NEUPL on Monday morning: we start with a new week and all materials are processed. All processing indicators are reset.
  2. Daily MRP: MRP NETCH runs from Tuesday to Friday, early in the morning, only materials that have undergone some type of planning relevant change are picked up for MRP, safely assuming that all other materials are still OK. The processing indicator of the materials in these runs are reset, the ones not included in MRP are untouched.

Note that in this MRP run setup there are two jobs: daily and weekly. This results in an MRP run on every day except Saturday and Sunday. Obviously if weekends are working days for your company’s planning department weekends needs to be included as well.

Also MRP runs in the morning and not before midnight. You want the stock date to be today’s date. Even though there is only five minutes difference between before and after midnight: yesterday’s stock date just looks as if you are using data that is not current.

I recommend staying away from NETPL. There is really no advantage using this procedure; only risk.

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7 thoughts on “MRP processing keys

  1. Pingback: SAP MM: MRP Processing Keys

  2. Ravi Vadla

    Hi,

    I like the notes provided in this site. I have a comment to make regarding “keeping awayr for NETCH” and sales order created at then end of planning horizon not considered when it comes under planning horizon.

    I believe that when sales order is created at the end of planning horizon, NETCH planning file is entered for material and by running MRP for NETCH
    this sales order requirement will be considered.

    I personally do not see any harm with NETPL.

    If we have a weekly job for NETPL with planning horizon of 100 days and daily job with NETCH we do not need regenerative planning at all ( only in rare cases of mass changes to requirements, etc)

    do you agree with me?

    Thanks for your answer in advance.

    I really appreciate all the notes provided in this site. It really helped me.

    Regards,
    Ravi Vadla

    Reply
  3. Mahesh

    You have mentioned to include Weekend , if the client are open on weekends. My question to you is how do i include the weekends + Holidays into our Planning CAlendar ?

    Reply
  4. Nguyen Le

    Hi,

    I like your article. I am running a NETCH 7 days a week. How is this negatively impact my MRP run by NOT running a weekly NEUPL? I also observed something very interesting… I am getting duplicate proposals during the weekend run. What could be the cause of this? Your feedback would be invaluable.

    Reply
  5. Kowboy Post author

    @ Nguyen Le: A change for a material outside the horizon will not be picked up by NETCH when this demand comes within the horizon. For material with plenty movement this will not be an issue. Their planning will be triggered by the short-term demand for the material on a regular (daily) basis.

    Reply
  6. RCS

    HOW CAN WE PLAN FOR AN ITEM,WHICH WE ARE TAKING FROM ONE SUPPLIER CASTED MATERIAL,SUBCON AGAIN POWDER COATED AND FROM OTHER SUPPLIER FINAL COMPONENT ON SUBCON,SO PLEASE ADVISE.
    THANKS

    RCS

    Reply
  7. Pingback: SAP MRP Process Keys | Sap Modules

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