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What is the role of the field 'Var. OUn'' in the SAP MM material master data purchase view?

There is a field called 'Var. OUn'' in the material master data purchase view, as shown below:

This field, which the author has been involved in before, has never been used. Therefore, the author has not studied or tested it, and has little knowledge of its usefulness.

In the P3 project, the author found that the value of this field is 1 in the purchasing view of many materials in the customer system. This aroused the curiosity of the author. What's the difference between setting it to 1 and setting it to 0? What are the consequences if it is set to 0? Read the F1 help document, roughly know the role of this field, said that if set to 1, indicating that the activation of variable order unit, which means that the procurement process can use the material master data or procurement information record (PIR) in the specified Order Unit other than any unit as Order Unit.

In spite of this, the author decided to spend some time testing it.

1. There is no value in this field in the material master data, indicating that variable order unit is not activated.

This value is automatically brought into PIR

PIR maintains that Order Unit is EA, assuming 1 EA = 1 KG (KG is the basic unit of measurement).

2, ME21N to create PO, enter supplier, factory, material number, enter, enter, the system automatically brings the order unit EA in PIR to PO

Forcibly change Order Unit to BX (BOX)

Enter

System hint: Order unit BX cannot be used. At the same time, order unit is automatically restored to EA. As pictured above.

Change Order Unit to BX, and save it directly without entering enter. When PO 4502607822 is generated, Order Unit still becomes EA, as shown below:

3, ME22N to modify PO, trying to change Order Unit to BX (BOX)

Enter

System hint: order unit BX cannot be used. At the same time, Order Unit is automatically restored to EA.

Change Order Unit to BX again

Forced save, the system no longer prompts anything, saved successfully

After saving successfully, Order Unit automatically becomes EA!

4, when we modify the material master data, set the 'Var.OUn' field in the purchase attempt to 1 (Active)

And modified the value of this field in PIR to 1

5, ME21N again to create PO, and enter Order Unit as BX

The system prompts me to maintain the conversion relationship between BX and EA. I maintain it well, 1 BX = 10 EA, as shown in the figure above.

Save and get purchase order 4502607827

The system can save the Order Unit BX I specified.

6, conclusion: as stated in the SAP F1 help document, if we do not activate Var.Order Unit, we will not be able to use Order Unit in the purchase order except for the Order Unit specified in PIR! If we activate Var.Order Unit, we can use any unit other than the Order Unit specified in PIR as Order Unit in the purchase order!

This is the control function of the 'Var.OUn' field' in the material master data purchase view.

2018-8-9 was written in Hangzhou.

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