About Alternative item usage prob value(percent) function

Hi guys:
How does Alternative item usage prob value(percent) impact which alternative item Production order uses.

Kevin,
Could you please look at the stock situation of material "A" and "B".
It looks like from your posting that "Stock of material A" is having shortage of quantity w.r.t to requirement quantity for the production order that is the reason it has pulled in material "B" in production order.
Key points to note
Alternative item: strategy
This value defines how items in an alternative group are selected for withdrawal postings.This strategy is ignored in material requirements planning (MRP).
Use
The withdrawal posting for the reservation in the production order can be selected as follows:
According to usage probability (manual changes possible)
For all items that you want to reserve, enter:
 - Strategy (value 1 or no entry)
 - Priority (only influences how materials are sorted)
 - Usage probability
Withdrawal if 100% availability
For all items that you want to reserve, enter:
 - Strategy (value 2)
 - Priority (If you do not enter a priority, the system checks the items in the sequence in which they are transferred to the availability check).
 - Usage probability
Usage probability in % (alternative item)
Percentage probability that a material will be used in the assembly.
Use
The usage probability is always taken into account for requirements planning.
Maintain selected usage probability
Requirements planning for alternative items is based on the usage probability.
Quantities are suggested based on the usage probability for the withdrawal posting according to strategy 1. You can plan in excess for the alternative items since the usage probability is not limited to 100%. You can change the proposed quantities. Maintain no usage probability If you do not enter a usage probability, the alternative item just serves as information that can be evaluated, for example, in a situation with a missing part.
You receive a warning since dependent requirements with 0 as quantity are created.
But if the strategy is "2" - "100% check" then the material which fullfills the requirement will be reserved for the production order after availability check.
So In your case change the strategy to "1" so that reservation is carried out based on the probability
Hope this helps....Reward your points,
Regards,
Prasobh

Similar Messages

Can you explain about Higher-level item category and item usage?

Hi all
Can you explain about Higher-level item category and item usage?
thanks all

Higher level item category and Item usage are used in the item category determination.
Let me take an example of Item Category TANN (Free of charge Item)
Item category Determination: Sales Document type + Item Category Group + Usage + Higher Level Item Category
TA + NORM + FREE + TAN = TANN
Higher Level Item category: The category on which this item category is dependent. meaning for TAN , TANN is a free item. Therefor TAN is the higher level item category.
Item Category Usage: It controls system response during document processing. The line item has an specific usage according to that usage it has to respond. Free for free items, text for text items etc.
Regards
AK
Reward points if helpful

Alternative item in BOM

Hi Experts,
I have a scenario. A is a FG and X and Y are the child items. We want to use X or Y is a alternative items in the BOM. i.e If X is available in the system, system backflush the quantity from X and if X is not there system backflush the quantity from Y. And if X is available in partial quantity, sytem backflush first quantity of X and then balance Qty from Y. Priority given to X is 1 and to Y is 2.
How can I maintain following fileds in BOM thru CS02 in Both X and Y.
Aternative item group
Priortity
Stragetegy
Usage Probabilty
GR

Hi G R,
Find below an example from a forum member - Mr. Mangalraj, i think it is one of the best ones to help understand the concept & usage. If after reading it, you need any more info revert.
Regards,
Vivek
Eg:
If there's a material Alt2 which can be used instead of a material called Alt1,now we will first form an Alternative item group using this 2 material.It can be more than 2 materials also.
Now in our case after u enter Alt1 as the line item for a HALB or FERT,select that entire row and click on Item details or Press F7.In Item data screen,in the bottom under general data u can find the field for Alternative item group.
Click that and enter the values as follows
A-Alt Item Group
2- Priority
2- Strategy
70% - Usage probability ,now come back.
Now enter Alt2 as the line item and after that as i said select that row & press F7.
Click on Alt.Item group button and enter the values.
A,
1,
2,
30%.Now save.
Now let's assume this BOM is used for a HALB.Let's assume 10 quantity is mentioned in the BOM for each of this line item.
Now if there's PIR for say 100 quantity
After running MRP for the HALB the requirements will be seen as Alt1 700 required & Alt2 300 required.
Here for the planning Only Usage Probability comes into picture.
When you are doing the production booking for making 100 quantities,the system shows 1000 quantity of Alt1 and no Alt2 will be seen in good's movement's screen.
Now the priority comes into picture,as we have given priority as 1 to Alt1 the systems proposes 1000 quantity of Alt1.
So while planning Only usage probability is considered and requirements fallas as per that.
While doing Production booking priority comes into picture.
So Here as we have maintained priority 1 and strategy as 2 for Alt1,the systems proposes 1000 quantity of Alt1.
If your strategy is then the planning & production will be as per the usage probability.
Second case:
If for Alt1 A & for Alt2- A
2 1
2 1
70% 30%
Planning will be 700 & 300 of Alt1 & Alt2.
But for production booking 1000 & 300 of Alt1 , Alt2 will be proposed by the system.Because For Alt1 though the priority is 2,but its strategy is 2.
For Alt2 priority1 but strategy is 1(Manual maintenance).

Alternative Item group not appearing CS11

Hi all,
We have created BOM with all the substitution materials which can be used at the time of Production.
We have utilised the Alternative item group for this. When i look at BOM for a material say X using CS03 i can see the Alternative Item group. But when i explode the BOM using CS11 i cannot see the alternative item group in it.
The scenario in details is :
For the header material X i have X1,as component with different change numbers and unique validity dates and this component is seen in 3 lines in BOM with alternative item groups against it.
Now when i explode the BOM using CS11 i can see X1 component with alternative group for only 2 line items.
We are in ECC6.0 version, can i ask you whether there is any patch or oss note to be applied.I have tried searching OSS notes but couldnt find them
Please advice as this is of very high importance.
Thanking you
Regards
Raj Kiran

Dear Raj,
What I wanted to confirm from you is ,after executing CS11--->
Changing Layout -
> Selecting Alternative Item group,
priority,Usage probablitity,the values are not shown in the field
properly though they are actually present in the BOM?
So enter the proper valid from dates in CS11(Select the date
on which the alternative item group is active) & also alternative
BOM number properly.
So go ahead as I suggested and even after entering the proper
valid from dates,Alt.BOM---changing layout ,if its not giving
proper results,then go for checking OSS notes.
This is with respect to ECC 6.0.
Check & revert back.
Regards
Mangal

Alternative items during MRP run

Hi,
I have seen discussion on alternative items in BOM. Thanks for all for sharing your knowledge. I knew alternative items will be choosen while creating / release of production order (material availability check)
Requirement:
For material A, I am using component B as priority 1 and component C as priority 2.
During MRP run, system needs to CHECK component B first. If stock is not available for component B then system need to consider component C automatically. It should not create any planned order for component B.
Is it possible, system will check automatically alternate items during MRP run? if so kindly let me know the logic.
If not, is there is any user exit. Customer is asking this facility. Its his basic requirement.
Kindly give your suggestions....
Regards / US

Hi.
I might have typed it wrong, I think the right one is called DIMP.
As far as I know you don't have to purchase it. In the past those extensions were known as Industry Solutions, in this case Automotive and A&D.
Before you go to this complexity for interchangeable materials functionality in MRP, I recommend that you have a design review with your customer, to strengthen the point that if two materials are the same for all usage purposes, but only differ, let's say, in the source (different manufacturer). for that in SAP we would define ONLY ONE material number, with additional manufacturer part number info, and in some cases with a classified batch.
Regards,
Mario

Alt bom components with ATP check - production order resets usage prob.

Hello,
I have searched many threads for this answer. Here is my scenario
BOM for finished good X has the following components
Component   |    Usage Prob   |    Strategy    | Alt Item Group   |   Priority
A          |             55%         |         2         |         1             |              1
B          |              45%        |         2         |          1            |               2
When I create the production order for 100 units, components A and B are proposed respectively (per usage probability, as expected)   - like so
Production Order
Component A = 55 units
Component B = 45 units
Here is the requirement - Component B at any given time is restricted by federal law to not be used for material X for more than 45% of its make up. Therefore my client cannot build X with more than 45% of component B. However, we always want to use at most 45%. IF component B is not available, transfer all or partial confirmation to Component A.
Issue:
ATP and usage probabilities will not work. Whenever I run ATP check for production order, the component with the highest priority get all the reqirements (if inventory permits). The production order master data is 'reset' by the ATP check (the usage probability on the component will change from 45% to 100%)
Any help is greatly appreciated!
~S
Edited by: futsol on Jun 29, 2009 10:41 PM

futsol ,
Maintainance is not required, it say manual maintainance is possible if required.
if you set it 1 system will check the proportion and do the reservation accordingly , if even in production order if you check availabity it will not change the quantity proportion, if its 2 , its meant for alloting the 100 % available component.if A is not 100% available it will replace it with B , if B is availabe to cover total quantity and vice versa.
by giving 1 it gives you option to change proportion as per your wish , if the any of the alternative is not available to fullfill rerquirement., for example in your case component B , if its available you want to use it 45% all the time , but if its not availabe the you can change the proportion or quantity for A in that specific production order only.
I dont know if there is any other way.
Check again with strategy 1 .
Hope it helps you .
Regards
Ritesh

Alternative item selection at the time of confirmation.

Hi, please suggest how to maintain alternative items and also how to choose alt items at the time of confirmation of specific material.

Hi,
Alternative item has to be maintained in respective BOMs.
Give the same item no in the BOM for the alternates.
Double click on one of the alternate item, the header data for the item will appear.
In the basic data Tab, enter the ALTITEM GRP value it can be any number or character.
CLick on the arrow button that will appear after entering the alternate item.
Give the Priority, Strategy & usage probability. BAsed on these values the alternate item is selected during BOM explosion.
The alternate item group value should be same for both the alternate items.
For further details refer
[Alternate Item|http://help.sap.com/saphelp_47x200/helpdata/en/f4/7d2ba044af11d182b40000e829fbfe/frameset.htm]

Bom alternative item group

Hello Experts,
I have one issue in BOM alternative item group I have made the settings as below.
Material 1     AltItemGroup         01
                     Priority                                  1
                     Strategy             2 100% check
                   Usage prob.         100
Material 2     AltItemGroup                      01
                      Priority                                  2
                      Strategy             2 100% check
                      Usage prob.         100
For Material 1 required bill of material quantity is 65 MT
For Material 2 required bill of material quantity is 65 MT
Now I am creating the process order for quantity 1000 MT. When the material availability check done it proposing as below in process order.
Material 1 = 65 MT    (Available Stock 807.109 MT)
Material 2 = 0 MT      (Available Stock 5.850 MT)
And again Material 2 = 32.5 MT
My question is as per above settings and stock situation of the material it should propose only Material 1 = 65 MT. But here system is also proposing Material 2 = 32.5 MT. Can any one tell what I am doing wrong?
Any settings are missing or what will be output for the above settings.
Please explain in detail.
Thanks in Advance
Regards,
Ganesh

Hi Ganesh,
Pl. make the following settings:
Material 1 AltItemGroup 01
Priority 1
Strategy 2 100% check
Usage prob. 100
Material 2 AltItemGroup 01
Priority 2
Strategy 2 100% check
Usage prob. 0
The strategy 2 will automatically handle the situation when Material 1 is not available and 2 is available.
Pl. test & revert. It will work as per your requirements
Regards,
HKV...

Alternative item group bom

Hi All,
Is there any way we can differentiate between the primary material and secondary material using alternative item in bom
I know we have usage probability strategy ranking in alternative group but i guess they dont specify which one is primary and which one is secondary material
any suggestions would be highly appreciated
Thanks
shaiil

Usage probability is for MRP run.
Priority is the order in which stock is checked in order to reserve.
if either 100% of A or 100% of B can fulfill the demand then it will pick that component based on priority (A first, B second).
Let us make it a little bit more detailed.
Component A
Priority 1
Strategy 2 ( 100 %)
Usage prob. 30
Qty reqd in BOM : 20 EA
Component B
Priority 2
Strategy 2 ( 100 %)
Usage prob. 70
Qty reqd in BOM : 10 EA
If Available stock
A: 20
B: 10
Component A is picked to make reservation.
If Available stock
A: 4
B: 6
(After MRP run)
pur req for A: 2 EA and
pur req for B: 1 EA
If Available stock
A: 0
B: 0
(After MRP run)
pur req for A: 6 EA and
pur req for B: 7 EA
If either 100% of A or 100% of B cannot fulfill the requirement then MRP run will look at the usage probability and generate purchase orders based on the probability and available stock.
But you want to purchase either component A or component B (according your requirement where you want to make one of them primary) It makes little sense to set one at 30% and other 70% so you set that component usage probability for primary as 100% and rest of the components in the group 0 so that pur reqs are generated only for the primary.
Example you always want the system to look for A if it's in stock and can fulfill demand but you always want to purchase B first, so you set priority 1 for A and probability 0 and usage probability 100 and priority 2 for B
Edited by: Jeevan Sagar on Oct 13, 2011 4:47 PM
Edited by: Jeevan Sagar on Oct 13, 2011 5:13 PM

Assigment of alternative items in Routing

Hello All,
In a BOM, Material A and B are alternative items with same item no. (grp-01,prior -1, strategy-1, usage prob A=100, B=0).
In routing, material A is assigned to operation 0010 and B assigned to operation 0020.
But when prod order is created, A and B both shows that they are assigend to same operation (either 0010 or 0020 whichever is assigned last).
Please say me why it is not assigned correctly.
regards,
ranjit

Hai ranjit kumar,
If you use alternative item in BOM, then system will read material component that belong to the same alternative group and strategy as one component. The principle of alternative item is there are few material code that can replace one item component BOM especially for good issue/reservation. In your case, why you assign alternative item B into operation 0020?? It should be in operation 0010. If you want to allocate material A to operation 0010 and allocate material B to operation 0020, then you must not set material B as alternative material A. Remember that alternative item will be substitute for the other when good issue is done. So, the system only propose one operation which component will be allocated.

Concept of alternative items

dear gurus,
 can any body explain the concept of alternative items.ie if 1 material is not there we can use other material.whether it is correct?what are all the other uses in using alternative items.please explain the configuration also
 - gide

Hello Mr.Gide,
I'm not willing to give you definitions & explanations for Alt.Item,
Group,
Priority,
Strategy,
Usage Probability.
Kindly check in SAP Help.
Let me put some practical inputs.
Eg:
If there's a material Alt2 which can be used instead of a material called Alt1,now we will first form an Alternative item group using this 2 material.It can be more than 2 materials also.
Now in our case after u enter Alt1 as the line item for a HALB or FERT,select that entire row and click on Item details or Press F7.In Item data screen,in the bottom under general data u can find the field for Alternative item group.
Click that and enter the values as follows
A-Alt Item Group
2- Priority
2- Strategy
70% - Usage probability ,now come back.
Now enter Alt2 as the line item and after that as i said select that row & press F7.
Click on Alt.Item group button and enter the values.
A,
1,
2,
30%.Now save.
Now let's assume this BOM is used for a HALB.Let's assume 10 quantity is mentioned in the BOM for each of this line item.
Now if there's PIR for say 100 quantity
After running MRP for the HALB the requirements will be seen as Alt1 700 required & Alt2 300 required.
Here for the planning Only Usage Probability comes into picture.
When you are doing the production booking for making 100 quantities,the system shows 1000 quantity of Alt1 and no Alt2 will be seen in good's movement's screen.
Now the priority comes into picture,as we have given priority as 1 to Alt1 the systems proposes 1000 quantity of Alt1.
So while planning Only usage probability is considered and requirements fallas as per that.
While doing Production booking priority comes into picture.
So Here as we have maintained priority 1 and strategy as 2 for Alt1,the systems proposes 1000 quantity of Alt1.
If your strategy is then the planning & production will be as per the usage probability.
Second case:
If for Alt1 A & for Alt2- A
 2 1
 2 1
 70% 30%
Planning will be 700 & 300 of Alt1 & Alt2.
But for production booking 1000 & 300 of Alt1 , Alt2 will be proposed by the system.Because For Alt1 though the priority is 2,but its strategy is 2.
For Alt2 priority1 but strategy is 1(Manual maintenance).

So many combinations can be made using this.Dont get confused.
If satisfied,plz reward points to all the answers which helped u and close the thread.
Thanks & Regards
Mangal
Message was edited by:
 Mangal

Alternative item concept

hi pp friends,
i have a scenario in which alternative items are required for selection purpose based on stock avilable ie. the alternative item which has highest stock must be selected.
Can you pl. detail me the steps how to map this scenario.
Regards
Laxmikanth

Laxmikant,
I will explain you the concept with an example.
In one FG lets take X, Y, & Z are meant to use as alternative to each other.
Enter all the componenets i.e. X,Y,Z as a component in FG BOM.
Fill up the required data i.e item category, quantity.
Now select all the three items & click on item details.
In the 'Basic data' tab page of first item i.e. X, give 'Alternative item group as 'A1'. (It can be any numeric or alfanumeric value).
The pop up will appear, enter priority as 1, strategy as 2 i.e. 100% (strictly in your case. Do not enter 1).
Usage probability anything but don't keep empty, say 50.
Now go into item details of the next componenti.e. Y, give 'Alternative item group as 'A1'. Similar to what you entered in first component.
The pop up will appear, enter priority as 2, strategy as 2 i.e. 100% (strictly in your case. Do not enter 1).
Usage probability anything but don't keep empty, say 25.
Now go into item details of the last component i.e. Z, give 'Alternative item group as 'A1'. Similar to what you entered in first component.
Repeat the entries in the pop up as in case of Y.
Save the BOM.
Now whenever the order will be created or released during the availabilty check system will check the stock.
Out of this three the component which is available more than the require quantity will be booked depending upon the priority, other two will be copied in the order with the nil quantity.
Two important things, you should have OPJK setting in place for that order type with material availability check ticked.
And second the stock of any of the component must always be more than the require quantity in the order or else system will book the compoenent as per the usage probability entered.
Hope this helps you.
SmanS
Edited by: SAP PP Consultant on May 13, 2009 5:37 AM

Need validation that ensures only one item has a value.

Hello,
I need a validation that ensures that only one item has a value. I want to allow a person entering information into a form to have the option to either select from a drop-down or enter something into a text box but not both.
I have found some information about validation of this type but I'm not sure how to use it. Here is what I found:
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
This validation ensures that only one item (ITEM_1, ITEM_2) has a value.
Example 5:
Assume a function similar to the following exists:
create or replace function sampleValidation (p_arg in varchar2) return boolean
as
begin
if p_arg= '1' then
return true;
else
return false;
end if;
end;
A validation of type PL/SQL Expression could then reference this function returning a boolean using the following syntax:
sampleValidation(v('MY_ITEM'))
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Please let me know how to implement this or give me another way to validate.
Thanks
Linda

Linda,
The best is to use a Validation of type PL/SQL Function Returning Error Text like this:
BEGIN
   IF :p1_item_1 IS NULL AND :p1_item_2 IS NULL
   THEN
      RETURN 'One of the items must have a value.';
   ELSIF :p1_item_1 IS NOT NULL AND :p1_item_2 IS NOT NULL
   THEN
      RETURN 'Only one of the items must have a value.';
   END IF;
END;Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://apex.oracle.com/pls/otn/f?p=31517:1
-------------------------------------------------------------------

Alternative items on Purchase Order

Hi Experts:
I have a question regarding the alternative items on Purchase order. If alternative item A2 is setup for item A1 from Vendor XYZ, and if we place a PO with XYZ for item A1 but they ship item A2: can we receive A2 in stock on the initial PO for A1? Dose SAP have these kind of solutions?
Thanks and best regards
Xincheng JIN

Hi,
there is one good solution for this sort of requirement...However, the limitations are there; may be suitable for example, we order for envelopes from vendor. You may order for one type of envelope and vendor may send other type...size may be the same, one envelope with window for address and other type may not have a window....similar such situations can be easily address using the standard SAP's below example: (I implemented this already in 2 projects previously)
http://help.sap.com/saphelp_47x200/helpdata/en/9f/fb79385feddf6ae10000009b38f8cf/frameset.htm
Example: Configurable Materials in Purchasing
You are responsible for procuring office supplies for your company, including envelopes. A printing firm supplies you with envelopes featuring your company logo in various sizes, with or without an address window.
In order not to have to create separate material master records for every possible combination (e.g. C5 with window, C6 without window), you wish to use a configurable material.
You must carry out the following activities for a configurable material:
Create characteristics
Create class
Create material
Create configuration profile
Create Characteristics
You define the criteria you use to differentiate between the variants of a material (in this case, the size of the envelope and the address window) by means of characteristics. You must create a characteristic for each criterion under Logistics ® Central Functions ® Classification System ® Master Data ® Characteristics Management.
Characteristic: Size of envelope
Enter size_of_envelope in the field Characteristic.
Choose Create.
Enter the following data on the tab page Basic Data:
· Description: Size of envelopes
· Data type: Character format
· Number of characters: 20
This indicates how many characters a characteristic value may comprise.
· Select the Single value indicator in the area Value assignment.
If you set the Single value indicator, one value only may be assigned to the characteristic. For example, only one size may be chosen when you specify the dimensions of the envelopes that are to be ordered in a PO.
Enter the following data on the tab page Values:
· Enter possible values for the characteristic:
Characteristic value
Description
DIN C4
229 mm x 324 mm
DIN C5
229 mm x 162 mm
DIN "Langhülle"
218 mm x 114 mm
DIN C6
162 mm x 114 mm
· Select the Additional values indicator.
If this indicator is selected, you may also specify values that you have not yet defined here when assigning values to the characteristic.
Choose the class type 300 (variants) on the tab page Restrictions.
Choose Save.
Characteristic: Address window in envelope
Enter window_in_envelope in the field Characteristic.
Choose Create.
Enter the following data on the tab page Basic Data:
· Description: Address window in envelopes
· Data type: Character format
· Number of characters: 4
· Select the Single value indicator in the area Value assignment.
Enter the following data on the tab page Values:
· Values of characteristic: yes , no
· Do not select the Additional values indicator.
Choose the class type 300 (variants) on the tab page Restrictions.
Choose Save.
Create Class
You group several characteristics to form a class. The class is then assigned to a material.
Choose Logistics ® Central functions ® Classification system ® Master data ® Class management.
Enter the following data on the initial screen:
· Class : Envelope
· Class type: 300 (variants)
Choose Create.
Enter a short description of the class in the Description field on the tab page Basic data: Envelopes with company logo.
On the tab page Characteristics, enter the characteristics you created previously: size_of_envelope, window_in_envelope .
Choose Save.
Create Material
Choose Logistics ® Materials management ® Material master ® Create material ® Create (general) ® Immediately.
Enter the following data:
· Material: Envelope
· Industry sector: Office supplies
· Material type: Configurable material
Choose Enter.
Choose the views Basic Data 1, Basic Data 2, Purchasing, and Accounting 1.
Enter plant 0001.
Enter the following data on the tab page Basic Data 1:
· Short description of the material: Envelopes with company logo
· Base unit of measure: KI (box)
· Material group: Office supplies
On the tab page Basic Data 2, check whether the Material is configurable is selected.
On the tab page Purchasing, select the Subject to batch management indicator.
On the tab page Accounting 1, enter the following data:
· Valuation class:
· Price control: V
· Moving average price: 99.95
Choose Save.
Create Configuration Profile
In the configuration profile, you assign characteristics to the material via a class.
Choose Logistics ® Central functions ® Variant configuration ® Configuration profile ® Create.
Select Material and choose Enter .
Enter envelope in the field Material.
Choose Goto ® Profile overview.
Enter the following data:
· Priority: 01
· Profile name: Envelopes
· Class type: 300 (variants)
Choose Goto ® Class assignment and enter envelope in the Class field.
Choose Save.
Use in Purchasing
You can now create, change and display this configurable material in all purchasing documents.
Display
If a configuration already exists for the material, you can display it in the purchasing document.
Change
If the configuration of the material was adopted from a sales order or from the material master record, you can change it in the purchasing document. This may be necessary if a material with the selected characteristic value cannot be supplied (is not available) and has to be changed to the material in the quotation.
If you change the configuration of a material in the purchasing document:
A new price determination process is carried out
You do not change the original configuration in the sales order or in the material master record as a result
Subsequent changes to the sales order or the material master record do not affect the configuration in the purchasing document
Create
If no configuration yet exists for a configurable material, you can create one in the purchasing document. This may be necessary, for example, if a configurable material is to be ordered without reference to a sales order.
Subcontracting items and the archiving of the characteristic values are not supported.
For more information on configurable materials, refer to the section LO Variant Configuration.

Partial substitution of alternative item material

Dear guru.
I have a bom with two alternative item (A and B) with same group.
I need that mrp create dependent requirement only for A and nothing for B.
After atp check if B is available and A isnu2019t available I need that the system create requirement for B for the available quantity and create requirement for A for the remained quantity.
How can I set the alternative item data group of bom for these two component ?
Thanks.

Hi,
I hope that I understood you right;
The set up of the alternative item group in the BOM should be like this:
Priority - 1 for A, 2 for B
Strategy - 1 for both
Usage Prob. - blank for both
Alternative item group - same for both
Now this works like this:
MRP will always plan A.
When ATP is checked in production order it looks first for A. If A not available or available quantity not enough, then it looks for B.
Be aware of system behavior when using this with backflush and overproduction! There is a note on this!
Regards,
Mario

About Alternative item usage prob value(percent) function

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