SAP Transaction OMM0: A Comprehensive Guide for SAP Users

Welcome to our tutorial on SAP transaction OMM0, a powerful transaction code used in SAP Materials Management (MM) module. In this tutorial, we will provide you with a step-by-step guide on how to effectively use OMM0 for managing material types in your SAP system. Whether you are a novice SAP user or an experienced consultant looking to expand your knowledge, this tutorial will equip you with the necessary skills to navigate through OMM0 seamlessly.

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Now, let’s dive into our tutorial on using SAP transaction OMM0.

What is SAP Transaction OMM0?

SAP Transaction OMM0 (Define Material Types) is a transaction code used in SAP MM to define and configure material types. Material types are used to categorize materials based on their characteristics and attributes. With OMM0, you can create, modify, and manage material types to meet your organization’s specific requirements.

Step 1: Accessing SAP Transaction OMM0

To start using OMM0, follow these steps:

1. Log in to your SAP system using your user ID and password.
2. Launch the SAP Easy Access Menu.
3. Navigate to the “Logistics” folder and expand it.
4. Locate and click on the “Materials Management” folder.
5. From the sub-menu, select “Material Master” and then “Basic Settings”.
6. Next, choose “Material Types” and click on “Define Material Types” to proceed to the OMM0 transaction.

Step 2: Understanding OMM0 Transaction Screen

Once you have accessed OMM0, you will encounter the OMM0 transaction screen, which consists of various fields and tabs. Let’s explore each of them:

• Material Type: This field displays the material type you are currently working on.
• General Data: Here, you can define the general attributes of the material type, such as its description, industry sector, and base unit of measure.
• Number Ranges: This tab allows you to define the number ranges for material numbers assigned to this material type.
• Account Assignment Categories: In this tab, you can assign account assignment categories to the material type, which determine how the material is accounted for in financial transactions.
• Valuation Classes: Here, you can assign valuation classes to the material type, which determine how the material is valuated in the system.
• Field Selection: This tab enables you to customize the field selection for the material type, determining which fields are mandatory or optional during material master data creation.
• Additional Data: In this tab, you can define additional data specific to the material type, such as the default storage location or the default plant.
• Screen Sequence: Here, you can define the screen sequence for the material type, determining the order in which screens are displayed during material master data creation.
• Availability Check: This tab allows you to configure the availability check settings for the material type, determining how the system checks the availability of materials during order processing.
• Purchasing: In this tab, you can define purchasing-related settings for the material type, such as the purchasing group or the purchasing value key.

Step 3: Defining Material Types with OMM0

To define a material type using OMM0, follow these steps:

1. Start by selecting the material type you want to define from the drop-down list in the “Material Type” field.
2. Next, navigate through each tab in the OMM0 transaction screen and enter the relevant information for the material type. Make sure to configure the general data, number ranges, account assignment categories, valuation classes, field selection, additional data, screen sequence, availability check, and purchasing settings according to your organization’s requirements.
3. Once you have entered all the necessary information, click on the “Save” button to save the changes made to the material type.

Congratulations! You have successfully defined a material type using SAP transaction OMM0.

Step 4: Exploring Additional Functionalities

SAP transaction OMM0 offers various additional functionalities to enhance your material management processes. Here are some notable features you can leverage:

• Copy Material Type: Use OMM0 to copy an existing material type and create a new one with similar attributes. This feature saves time and effort when defining multiple material types with similar configurations.
• Change Material Type: OMM0 allows you to modify existing material types. You can edit fields such as the description, industry sector, or any other attributes. Simply select the material type you want to change and make the necessary modifications.
• Delete Material Type: If a material type is no longer needed, you can use OMM0 to delete it. However, be cautious when deleting material types as it may have an impact on existing material master data and related processes.

Conclusion

In this tutorial, we have provided you with a comprehensive guide on using SAP transaction OMM0 in the SAP MM module. We covered the basics of OMM0, explained how to define material types, and explored additional functionalities. Remember, continuous learning and practice are key to becoming proficient in SAP MM.

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