Planning Time Fence Use with MRP

Hi,
I was wondering if planning time fence has use with an MRP type without a firming type. Basically, SAP says it is only used with the MRP contains a firming type. However, i thought the planning time fence is also used with SAP. For example, i can tell MRP to only plan materials outside of the planning time fence. Anyway, just looking for further insight or clarification.
Thanks, Erik

for automatic firming ,
you need to maintain a MRP type related to firming , while running MRP , system will firm the order with in the planning time fence, & based on the firming type, any new requirement system will plan according to the MRP type
Firming type 1- P1 or M1. The date of new order proposals that are actually created in the planning time fence are rescheduled out to the end of the planning time fence. Therefore, these new order proposals are not firmed.
Firming type 2- P2 or M2: The system does not create any new order proposals within the planning time fence. That is, the shortage situation is not adjusted within the planning time fence.
Firming type 3- P3 or M3: Order proposals that lie within the planning time fence are not firmed automatically. The order proposals required to cover the requirements are moved to the end of the planning time fence.
Firming type 4- P4 or M4: Within the planning time fence, the system creates no order proposals automatically. That is, the shortage situation is not adjusted within the planning time fence.
Manual firming
you can firm the planned order in MD12

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Planning time fence using a specific calendar

Hello
Planning time calculation is using workdays and the factory calendar.
I have a customer request to have the planning time fence use a specific calendar, not containing holidays and non-active periods. Is there a possibility in ERP to define a specific calendar for planning time fence.
Rgds
Pascal

Dear PPIO,
This is with ref to your response to the above question. I too have a similar problem.
We have a factory Calendar (US) that is used on our day to day business. This factory calendar does not include the weekends and public holidays.
I created a SAP Planning Calendar(DSI) via MD25 but when i ran the MRP it still gives me the result based out of the Factory Calendar.
I would like to see my MRP to propose including weekend and public holidays.
If you could send me your id , i could send the screen shots.
Regards,
RAjnish

Scheduling Agreement & Planning Time Fence

Hello,
I read a lot of articles on Planning Time Fence and the MRP Types P1 to P4 that goes with it. And I have tested it out in a Testing Environment.
But I can't get it to do what I need.
This is a normal planning with no PTF and MRP Type PD.
Sometimes we have false requirements that show up in the past due to human error. When this happens, MRP rolls during the night and adds a bunch of deliveries in the past to cover the requirement.
I wanted to use the PTF to prevent this. Meaning that extra deliveries would get added by MRP but after a PTF and not Firm deliveries. So that once the error is corrected, MRP rolls again and deleted all the extra deliveries it added.
** Only P2 and P4 adds deliveries after the PTF, but I need it to act normal on a day to day basis aswell and have MRP create deliveries like the print screen above. To add non-Firm deliveries after the PTF is just in rare cases of human error.
Not sure if my explanation is clear.
Patricia

Hi Patricia,
The planning time fence is there to stop MRP from making changes to requirements that fall within the planning time fence.
Your planning time fence is a rolling period which shifts by 1 day each day and is calculated as of the current date. Yesterdays date is passed so it would not make sense for a planning time fence to use a date in the past to start it's calculation.
Everything that falls before the end of the planning time fence will not be changed by MRP and you will see that all these schedule lines in MD04 will have an * assigned meaning they are firmed for MRP.
If you manually add schedule lines in the past, the planning time fence will not stop you from doing this. The planning time fence will only stop MRP from making changes.
By the way:
If you manually add requirements to the scheduling agreement then MRP will never change these requirements as these are fixed requirements.
If your customer would add requirements in the past or you add independent requirements in the past and your current stock does not cover the requirements the system will generate schedule lines and will put these directly after the planning time fence with an exception message assigned to them.
As a side note:
I always wonder why such questions arrive in the forum as this is something that can be very easily tested in the test environment.

Firmimg the orders and planning time fence

Hi, Pls explain about firming and non-firming and planning time fence while running mrp or mps?what is meant by firming the orders? i do not know how it work and how can we interpret the reults? pls explain with one example.

Firming: When an order is firmed , indicates that the Order no longer needs to be planned in MRP.
Order gets firmed, when we change plannde order manually and save .
Planning time fence: the time period during which if any Order comes it gets firmed subject the Compatible MRP type.
Depedning on whether they need to be firmed or not and when a new requirement is creatd in the planning horizon, How the receipt needs to be planned within the Planning time fence or out side is controlled in the MRP type.
Regards
Ratan

Planning time fence with Lot size MB

Hi Friends,
I am facing one issue as below,
I am using MRP type P3 , Planning time fence is 20 days , Lot size is MB (Monthly). I am not using MRP group.
Planning time fence should be calculated as Todays date+Planning time fence on MRP1 but if the calculated date with this formula is going in next month system takes first date of next following month as Planning time fence (effect of lot size MB).
WIth lot size EX , it works fine.
Can we avoid shifting of Planning time fence to first date of following month with lot size MB?
Thanks.
Sandeep

I got a workaround , I have used 2 lot sizing procedure in a sigle lot size. Daily lot size (for Short term) and Monthly lot size for Long term. For short term requirements are grouped for 28 days. Closing the thread. Thanks.

Managing planning time fence ( P1 MRP type ) and firm zone in ME32L

Hello,
I want to know if there is or are some documents to know how to manage planning time fence in MM02 and firm zone in ME32L ?
For me, in ME32L the firm zone is the firmed quantities sent to suppliers but not firmed for MRP so how to manage this easily ?
Thanks.
Romeo.

Dear,
Firm ZOne in SA, says that that much qty will be procured from that vendor with in that date specified, if not taken the production cost and cost related to that will be paid.
Now the planing time fence, is the time with in which no change is allowed. Hence if there is any new requirement to that RM, then it will be pushed to outside the time fence.
Hence if there is a schedule line which is already there and requirement is coved with in that, then your requirement is met, if not system will create a new schedule line in the trade off zone/planning zone.
I hope you got the point.

Planning time fence- MRP

Hi Guys:
Can I use Planning time fence if i am using MRP type PD?
what are the settings i need to maintain for planning time fence and how it defined generally , is it a function of leadtime?
Thanks
Kodali

Hi Padmasri :
How to freeze the order proposals if i am using MRP Type PD.
Because , I might run MRP Yesteraday it might have created Planned orders or Purchase requistions and Buyer might have issued purchase order to the vendor.
today i got some more sales order and additional requirements , So when i run MRP today System propose Purchase requistions asking to change the previously created requistions on Previous Run?
Could you explain how to manage this scenarious without timing fence and still using MRP type PD?
Thanks
Kodali

Link Planning time fence with planning calendar

Hello,
In MD04 transaction, we can see the planning time fence lign. In my system, the planning time fence lign is calculated based on the plant calendar (SCAL transaction).
But, we will like to calculate the planning time fence based on the planning calendar (MD26 transaction) and not on the plant calendar.
I mean, when I close a period in the planning calendar (MD26), I want that the system establish the new planning time fence lign based on the planning calendar.
Does anyone know if it's possible? If yes, how should I do ?
Best regards,
Gwen

Hello Gwen
The planning time fence is always calculated according to the factory calendar defined at plant level.
If you are using a periodic lot-sizing procedure with a time fence, system may generate replenishment proposals outside the planning calendar dates, especially if you are using a goods receipt processing time. If you want to make sure that the dates will be always according to the planning calendar, you may check the following modification note:
397870
MOD:Procurmt propsls on non-dely date due to plng time fence
If you want to create your own logic to calculate the time fence, you may use the BAdI MD_MRP_PARAMETERS.
BR
Caetano

MRP type & planning time fence

Hello.
When I enter MRP type at MM01, error message comes up;
"The MRP type requires you to specify a planning time fence."
This check is not necessary for us.
Please teach me how to deactive this check.
Thank you in advance.
Emma S

Thank you for your reply.
To Vijay
I can't use PD because we run MRP on this material.
I want to know how to prevent these MRP type from requiring Time fence.
To Maria Nunez
Firming type of the MRP type is set "0(Planning results not firmed)".
Both ex-R/3 (Enterprise) and new R/3 (ECC 6.0) are set same.
But only ECC 6.0 requiring Time fence.
Any other customise affects??
To R.Brahmankar
This errror message (M3/097) is not set at transaction code OCHS, OMT4 and OMCQ.
If it was set, I would change the message type...
Thank you and regard.
Emma S
Edited by: Emma S on Dec 2, 2008 7:33 AM

Defining planning time fence and creation indicator with out oppr settings

Hi, we dont use mrp groups and accordingly i did not set oppr settings. i observed that planning time fence and the creation indicator (omdz & oppr) are defined thru mrp goups. please advise how to define those w/o oppr settings? is there any seperate settings or oppq settings for them? please advise.

Hi,
Maintain it directly in the Material Master.
Best Regards,
Siva

Planning time fence and MRP question

Good morning,
We have the following requirement:-
1. We want the Planning time fence to move once a week (by 1 week)
2. If we have a schedule line at the end of the Planning time fence, we want this to move inside the planning time fence (as per step 1)
3. Put a fixing indicator on anything that falls into the Planning time fence (as per step 1).
Thanks in advance

mm

Firmed planning time fence

Hi gurus,
My business scenario is to firm my planning shop flloor during 60 days.
To do it I used the planning Type P1. So If there is a requirement during these 60 days the planned orders is proposed at the end of this time fence. But this is the requirement date that is defined out the time fence. I have to begin the production (and so change the shop floor planning) during my firmed time fence of 60 days to respect the planning proposed by MRP.
Is it possible to achieve my scenario ?
Thanks.

Hello Laurent,
If I've well understood what you want :
you would keep normal run of P1 for any planned orders which cover a requirement inside the planning time fence, and in the same time, you would get new proposals from the MRP in the planning time fence if the requirement date is outside the planning time fence.
In this case, it seems me to be a bit difficult.
The planning time fence is done to take in account the procurement proposal and not the requirement level. Basically, it's firmed the production plan in a defined horizon whatever the requirements could be.
In anyway, we could imagine a specific program which runs after the MRP with these internal steps:
. selection of the planned orders which have been rejected outside the planning fence,
. filtering the selection against the requirement date (keep the date outside the planning time fence),
. changing the start date of each good planned order and firming it ( & setting an opération code ).
In my opinion, technically speaking, the bolt-on is very simple but the impacts on the MRP process has to be evaluate for the final users (understanding and maintenance). Moreover, there is the difficulty to determine the requirement origin in some context.
I hope to be helpfull,
With regards,
François-Robert NICLOT

MF50 : Planning table and planning time fence

HI,
I use the transaction MF50 as planning table ( in order to do my MPS planning), I use "set firming date" to fix a firming date.
Now, I want o know if it should possible to reveal a message when we create a planned order within the firming date??
Thanks for your answer.

Hi,
For clarity , I am describing below the functionlity of Set Firming date is explained as below:
By setting Manual Firming date , we extend the planning time fence.
If a planning time fence has been created for a material then the following applies:
If the manual firming date lies before the end of the planning time fence, the planning time fence is still valid.
If the manual firming date lies after the end of the planning time fence, the planning time fence is extended until this date.
All order proposals with availability dates that lie before the end of the planning time fence of the manually extended planning fence are firmed for the planning run, if the materials have an MRP type which contains firming type or firming type 1 or 2
The system does not automatically firm order proposals for materials that have an MRP type with firming type 3 or 4, even if their availability dates lie before the end of the planning time fence or manually extended planning time fence.
Please check if this helps you.
Regards
Datta

Planning Time Fence Value

Hi Team,
I would like to maintain planning time fence value in material master. I do not have any clue that how to determine the value for the planning time fence. Some where i read that the planning time fence value will be the interval time between two MRP runs (ie, if i run MRP four days once, 4 days will be the planning time fence). Is this logic work out? Any guidance to determine the planning time fence for the material?
Thanks

Hi Mariano,
Q1: By implementing Time Fence, you are losing flexibility, so this goes against the service level, so is not going to avoid cutting sales. However, sometimes you still need to use a time fence in order to provide some stability to your supply chain (maximize the use of your production capacity, coordinate the component replenishment with your vendors, etc..).
Your statement is: "By implementing planning time fence, you are losing flexibility".
"Losing Flexibility" means, if there is sudden sales requirement (Eg: Emergency sale order), accordingly the manufacturing plan will NOT be smoothened. Do you mean this as "Losing Flexibility"?
For your information, i am using strategy group 40 for my FERT item. The strategy group 40 will be mainly used to smoothen the manufacturing plan according to the sudden sales requirement. Implementing strategy group 40 & planning time fence together for a material will be AGAINST of each other know?
Coverage Profile:
Your statement is:
Q3: As coverage you can use different methods: coverage profile, safety time, safety stock, etc. The coverage profile is a key that needs to be predefined in advance. I will try to simplify the explanation. Suppose that your coverage profile says that you want to have 10 days of target coverage. If you have a constant forecast of 1000 CS per month and you have 20 working days in a month, this 10 days of target coverage will mean that you want to have 500 CS in excess of your forecast. So the MRP will plan to start the month with 1500 CS (1000 CS of forecast + 500 CS of coverage).
According to you, the MRP will plan for 1500 CS instead of 1000 CS for the month. But for that particular month additional 100 requirement has come as emergency sale order. How to handle this? My requirement is "How to handle (cater) the emergency sale orders effectively in ECC?" Will "Back order processing in SD" can help to cater these kind of emergency cases?
Thanks

Planning horizon and planning time fence

What is the meaning of terms
- planning horizon.
- planning time fence.
Where and how we can use these terms?
Kindly explain with a example.

Hi,
1. planning horizon
Net change planning in the system only plans materials that have undergone a change that is relevant to the planning run within the period which you defined as the planning horizon. The system sets the net change planning horizon indicator automatically for these materials.
In net change planning in the planning horizon, the system only plans those materials provided with the net change planning horizon indicator.
2. planning time fence
The planning time fence dictates a firm period for planning purposes. Subsequent MRP runs will not create planned orders within the time fence but will place them just outside it. Orders must be manually moved forward if desired. The idea is to create a short term period of plan stability.Check the MRP tabs on the Material Master for the planning time fence
period for the material.
Regards,
Sankaran

Planning Time Fence Use with MRP

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