Forecasting calculation

How does the system calculate forecasting value in mrp while executing mp30.(the value in reflecting in material master)

HI
AS YOU SAID , THE INITIATION PERIOD WILL NOT BE SAME FOR ALL THE FORCASTING METHODS. PLS
GO AND USE THE APO LIBRARY.

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Scheduling Agreement JIT / Forecast calculating wrong

Hello experts,
I´m with a problem with JIT / Forecast.
The forecast are calculating wrong values. For example:
Cumulative quantity calculated: 584
JIT schedule:
DATE             TIME         Order Quantity       Cml. released quantity        Open Quantity
06.01.2012     00:00     32          32
10.01.2012     00:00     352          384
13.01.2012     00:00     128          512
17.01.2012     00:00     88          600              16
Forecast schedule
DATE             TIME         Order Quantity       Cml. released quantity        Open Quantity
20.01.2012     00:00     112          112
24.01.2012     00:00     224          336
27.01.2012     00:00     128          464
31.01.2012     00:00     200          664
The values of forecast are calculating by Cumulative quantity calculated that is 584 and I dont have any Open Quantity and in this case I need to have Open Quantity in Forecast.
The forecast must not be calculated by the amount in transit
Help me.
Tks
LFC

Hi ashish
Check the planning delivery schedule tab and go to item data -> delivery schedule header and check wheather any proper information has been filled or not
Regards
Srinath

Seasonal + Trend forecast calculation

all,
We are using Consumption based planning with MRP type VV and Forecast model - X and material master maintained as below.
For testing purpose, I have maintained past consumption for last 6 month as below screen shots.
When I execute forecast from Material master tab, I got basic values, MAD, safety stock & error total as below..
How System is calculating above values?. I have gone through the formula but didn't understood and also gone through below link but didn't get sna idea.
http://http://scn.sap.com/community/erp/post!input.jspa?containerType=14&container=2110&content Type
And How System calculate below corrected forecast values?
Please help to understand calculation.

Hello Mr,
Please check below link for seasonal trend calculation formula, Insert values and try to cross check result.
I hope this link helpful to you.
Forecast with Seasonal Trend Model - Forecasting - SAP Library
https://help.sap.com/saphelp_scm70/helpdata/en/46/a605b9d57052b8e10000000a155369/content.htm
Thanks & Regards
Umesh Mali

Forecast calculated wrongly

Hello Team,
The problem is that movement types 631/632 (deliveries to customer consignment stock) were not taken into consideration.
I added them manually, but the figures in MC94 after this transaction is not relevant to MB51. And that is the reason that forecast was calculated wrongly.
Could you please help me in this. Help will be appriciated.

It may be you aquire the assets in Mid year and calculating the depreciation from that month,but system is posting total depreciation in that particular month by taking in to account all the previous month depreciation
Have check the depreciation by changing the depreciation start date to start of your Asset accounting year
Thanks
Ansuman
Edited by: Ansuman mohanty on Mar 31, 2008 1:10 PM

SAP F&R:: Service Levels & Forecast Frequency

Hi, while modelling some user requirements, I have come to figure out some kind of a "dynamic" link between the service levels "determined" for a location-product and the forecast frequency assigned to the said location product. Please find my observations below.
OBSERVATION
1. To start with, I had assigned an experimental Service Level Profile with all Service Levels values set to 99.99%.
2. However I find that for location-products which have a weekly forecast frequency as compared to those with a daily frequency, the system automatically/ dynamically determines a service level of 91.00, which is a value that is not maintained in the service level profile.
How does the system do this? What is the link between the forecast frequency and the service levels determined?
Looking forward to some suggestions!
Vismay Jani.

hello,
you can define service levels for let's say different objects
- selling class
- ABC indicator
to simply the maintenance you can define a more "global/general" service level for each object.
the selling class is calculated/determined by each forecast calculation automatically. if the selling class changed an other service level will be considered by the next forecast calculation automatically.
there is definitively no difference between a daily and a weekly (or what ever) forecast frequency.
regards, Hans-Georg

Select planning level for forecast caluculation manually

Dear all,
In S&OP on HANA we would like to run the forecast on a more aggregated level than the base planning level.
The base planning level in the input/output key figure of the forecast profile is supposed to be lower than the level which should be used for forecast calculation. If the filter in the forecast profile menu is set to the higher level, the forecast is still calculated on the base planning level and aggregated according to the settings in the key figures.
Is it possible to manually define the planning level the statistical forecast is supposed to be run on?
Thank you in advance!
Jamie

Hi Nikhita
There is a transaction " define planning levels for logistic". In this step you allocate transaction from MM and SD to the planning levels you ahve defined. this allocation is neccessary since the system cannot determine planning level by using master record fields as it does to access data from FI.
In FI planning level for G/L is specified in G/L master. However a business transaction in logistics is represented by an Internal ID
1 = PR
2 = PO
3 = Scheduling agreement
you must assign these transactions to a plannning level in CM
T-code :- Financial Supply Chain Management> Cash and Liquidity Management>Cash Management>Structuring>Define planning levels for Logistics
Please let me know if you ahve done this setting. Would advise you to revisit your config for INT code - level- Planning group.
Hope this helps. Please let me know if you still cant get around.
Thanks
Sanjeev

Using calculation variables in OBIEE analysis

Hi,
I have a report where I have to calculate various ratios, including forecast calculations. If I write a pseudocode for this, it will involve several variables (intermediate step values).
In BO, we have concept of variables in Webi to store intermediate results. Is there anything similar in OBIEE which we can use ? Can you please help.
Thanks

Hi,
Global variables will work in the same way as local variables so you are using them correctly.
Business rules are just really glorified calc scripts, if you want to know about calc script commands have a read of the tech ref :- http://download.oracle.com/docs/cd/E12825_01/epm.111/esb_techref/frameset.htm?launch.htm
It will have all the calculation commands and functions and descriptions on how they work.
Cheers
John
http://john-goodwin.blogspot.com/

Best way to know correct forecast model - process chain set up with multiple forecast models

Hi Experts,
I need your help in selecting best forecast model for our company. We have some of the models already used for our company, and because of multiple models used it is taking very long time for process chain to finish. There is no existing documentation available on which model was used why initially. Please help me to make out forecasting process smooth.
- What is the best way to know, which forecast model is correct and should be used for our forecasting process.
- In case multiple forecasting models are really required to be used, please suggest ways to optimally schedule them in process chain.
- At times we get messages like "not enough data available" for specific model - any way to avoid this.
- How to optimally use parallel processing profiles forecasting process in process chain.
- Things which should be avoided.
Request your help, please share your experiences.
Regards
NB

Hi Neelesh,
There are many points you need to consider to redesign forecast process for your company/client.
You need to select the best suited forecast model first depending on the business. This has to be well tested & agreed by business users. Complexity will be an outcome of this exercise with business users. Best id to give then a brief intro on all available models & then help them selection the best one as per their requirement.
Auto selection models are generally more time taking & should be used only when you have no idea at all on the business/demand pattern.
Run time will depend how you are clubbing the CVCs to get the forecast generated & also parallel processing. For parallel processing profile you will need to do trial & error testing along with help from Basis team on how many free dial up processes are available.
Even you can run many forecast calculations in parallel if the product/cvcs are totally different. - As per my personal experience maximum run time reduction can be achieved here.
Daily run is not advisable except only for businesses where you have too much dynamism in demand planning i.e. you expect the demands to be changed overnight. Most of the companies run forecast on monthly basis or at weekly basis at the max.
"Not Enough data" will be a problem if you are having the irrelevant models used in forecast profiles. This means users are not bothered to maintain the needed data for he forecast calculations or they are not aware at all of the situation. Running such models on daily basis is not advised at all. Better users should use interactive forecasting & saving the results in such cases.
Just to give a crude example we get forecast calculated on monthly basis for approximately 4 lac cvcs in less than 3 hrs using moving avg, seasonal linear regression, seasonal trend, croston models. We use parallel profiles also everywhere with 10 blocks & 500 cvc/block.
Hope this helps. Let me know if you have nay more questions & also the results using any of this.
Regards,
Rahul

What is ExPost Forecast ? how to calculate it?

Hi Frnds
I would like to know more about Ex-Post Forecast Method kindly let me know the clear details about this ?

Ex Post Forecast is generated by the system during the statistical forecast calculation and only appears in historical periods. It shows you how the system is interpreting the demand history as it processes it. In this sense, it shows you how the system is "learning" the history. All forecast error metrics are calculated by comparing the ex post fcst to the demand history, so lower forecast error numbers mean the forecast profile assigned to the selection fits the history better.
In our implementation, we have included a key figure in the planning area for the ex post forecast so that the planners could see the comparison of ex post to history in the dataview graph. This lets them see at a glance how well the model traces the history.
You may also want to include a key figure for Corrected History in the planning area and in a dataview. The system actually copies history to 9AVCORHIST at runtime to use as the basis of the statistical forecast, and the results of background processes like Lifecycle Planning (Like, phase-in and phase-out profiles) and promotion planning show up here -- this makes it easier to trace what the system is doing and how it arrived at the statistical forecast.

SAP F&R:: Forecasting at any level other than LOCATION/ PRODUCT- LOCATION

Hi, I am trying to check if F&R has the capability to let me plan the forecasting process at any level other than Location-Product.
For example, I wish to execute a WEEKLY FORECAST only at the MERCHANDISE CATEGORY level, for all products defined under that MERCHANDISE CATEGORY. Is it possible to execute the forecast process this way? Please throw some light.
Thanks!
Vismay!

Hi Vismay,
you could use the mass_maintenance for location products and assign the forecast frequenca profile to all location products of a certain merchandise category (use merchandise category as selection).
Alternative could be (if you are interested to do the forecast calculation once a week): You can create a new forecast frequency profile with the appropriate settings (weekly forecast; weekday the calculation has to be done; recurrency = 1). Define this new profile as the default profile!
Best regards,
Uli

Executing Forecast for material - original and corrected forecast values

Hi,
When we execute a forecast for amaterial that has a corrected forecast value this info is then moved the the correcponding period to the historical value. There are two historical values, the original forcast value and the corrected one. I would expect my original and corrected values to be moved to the hostorical values indvidually but what happens is that both the original and corrected historical take their value from the original forcast and the corrected vale is lost.
Is this what should happen or can this be corrected?
Thanks

I just forgot to execute forecast calculation in forecasting view, now problem gets solved, sorry, then I need to close it.

MM02 forecast periods

Hi,
in mm02 in forcasting tab the forecasting periods where it will store that value,
or else how to get that value for perticular material,
THX

Hi,
1. History periods:
The number of historical values the system uses for the forecast.
If fewer historical values exist in the system than specified here, the system includes all the existing values in the forecast.
If this field remains empty, no historical values are used to carry out the forecast. However, this is only possible in the case of manual initialization.
2. forecast periods:
Number of period splits for which a forecast should be created.
3. Periods per season:
Number of periods that belong to a season.
Procedure
You only specify a number
if the forecast model is a seasonal model
if you want the system to carry out a seasonal test
4. Initialisation periods:
Number of historical values that you want to be used for initialization.
If fewer historical values exist in the system than specified here, the system includes all the existing ones.
If the field remains empty, no historical values are used to initialize the forecast.
5. Fixed periods:
Number of periods for which the system will not recalculate the forecast values in the next forecast. The fixed periods start with the initial forecast period.
Use
You enter a value
in order to avoid excessive fluctuations in the forecast calculation or
because production can no longer react to changed planning figures in the specified horizon.
Hope this helps.
Award points if useful.
Regards,
Tejas

How to track Changes done in planning book....by whom.....in DP planning

Hi All,
I want to track the changes done in Key figures in planning book ..........mostly by whom .......let me know how to track the same in APO DP planning book...........any std..........way..........like R/3...........pl reply.............your expert guidence will be appreciated..........by rewarding the same..............Thanks...........
Best Regards
Sharad

Hi,
You would be able to tackle this partially by adding a new hidden key figure.
Refer the example below;
Kfig1. Stat forecast: Calculated using stat forecasting
Kfig2. Adjusted forecast: user normally changes this
Kfig3. Hidden copy of Adjusted forecast:
Using macros copy 1st snap shot of stat forecast to Adjusted and Hidden. once adjustments are done, use Macro to compare Adjustments and Hidden copy of original values, or this can be a overnight batch job to generate alerts
Hope this helps.
Pradeep

How to handle same material number but different condition?

In our industry(aerospace aftermarket), we can have inventory for one material in different conditions, e.g new, overhauled, scrap, etc. We use batch management and store the condition at the batch level. This probably was not the best way to handle this and now we're wondering how we can run MRP for a specific material, but only for certain conditions.
From what I understand MRP only occurs at the material level, not the material-condition level. Is my assumption correct? Obviously, we would not want to include scrap inventory in any MRP or forecasting calculations. So if we had 10 for material 1234 in inventory, we'd want to exclude the amount that's scrap or any other condition we don't want to include in a forecast/MRP.
Is there a best practice that someone can share to handle this type of inventory management issue? Thanks!

Hi,
I've never used this but please have a look at it:
http://help.sap.com/erp2005_ehp_04/helpdata/EN/c6/126422bd9c11d1b54f0000e82de178/frameset.htm
Planning startegies for variants:
This section describes how to plan products that have a practical limited number of possible combinations of characteristics and characteristic values. Technically speaking this section describes the use of variants to sell configurable materials.
Regards,
Csaba
Edited by: Csaba Szommer on Feb 5, 2009 10:46 PM

Secure APO Planning book by location

Hello All - I am hoping you can help me. I have been trying to find a way to secure updates to a shared planning book in DP by Sales-Org. The Sales-Org in our environment is a "navigational attribute" and not a "characteristic". I tried creating a custom object using RSSM to no avail. I found some documentation that said you could use a user exit or BAdi method "SELECTION CHECK' (/SAPAPO/SDP_SELECTOR) to run additional authorization checks. I need to know whether this method could be used to secure a _Navigational Attribute?_ If so, what information do I need to provide to the developer to implement this exit?

Hi,
You would be able to tackle this partially by adding a new hidden key figure.
Refer the example below;
Kfig1. Stat forecast: Calculated using stat forecasting
Kfig2. Adjusted forecast: user normally changes this
Kfig3. Hidden copy of Adjusted forecast:
Using macros copy 1st snap shot of stat forecast to Adjusted and Hidden. once adjustments are done, use Macro to compare Adjustments and Hidden copy of original values, or this can be a overnight batch job to generate alerts
Hope this helps.
Pradeep

Forecasting calculation

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