SAP Transaction OMMS: A Comprehensive Guide for SAP Users

Welcome to our tutorial on SAP transaction OMMS, a key 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 utilize OMMS for managing material master data in your SAP system. Whether you are a novice SAP user or an experienced consultant looking for a refresher, this tutorial will equip you with the necessary knowledge to navigate through OMMS seamlessly.

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Now, let’s begin our tutorial on using SAP transaction OMMS.

What is SAP Transaction OMMS?

SAP Transaction OMMS (Material Master Data) is a crucial transaction code used in SAP MM to create, change, and display material master data. Material master data contains essential information about materials, such as their description, classification, unit of measure, and more. With OMMS, you can seamlessly manage and maintain accurate material master data, ensuring smooth procurement, production, and inventory management processes.

Step 1: Accessing SAP Transaction OMMS

To start using OMMS, 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 click on “Material.” This will take you to the OMMS transaction.

Step 2: Understanding OMMS Transaction Screen

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

• Basic Data: This tab contains the main fields for entering general information about the material, such as material type, description, base unit of measure, and more.
• Purchasing: Here, you can define purchasing-related information for the material, such as the purchasing group, purchasing organization, and vendor data.
• Sales: This tab allows you to maintain sales-related data for the material, including sales organization, distribution channel, and pricing conditions.
• Accounting: The accounting tab displays accounting-related information for the material, such as valuation class, cost center, and profit center.
• Plant Data: Here, you can specify plant-specific data for the material, such as storage location, available stock, and replenishment lead time.
• Work Scheduling: This tab allows you to define work scheduling data for the material, such as production version, routing, and scheduling margin key.
• Classification: In this tab, you can assign classification values to the material based on predefined characteristics. This helps in organizing and categorizing materials.
• Additional Data: Here, you can enter any additional data specific to your organization’s requirements, such as product hierarchy, weight, and dimensions.

Step 3: Creating Material Master Data with OMMS

To create material master data using OMMS, follow these steps:

1. Start by filling in the necessary fields in the “Basic Data” tab:

   • Material Type: Select the appropriate material type from the dropdown list.
   • Description: Enter a brief description of the material.
   • Base Unit of Measure: Specify the unit of measure in which the material will be managed.
   • Material Group: Assign the material to a predefined material group, if applicable.

2. Move to the relevant tabs (e.g., Purchasing, Sales, Accounting, etc.) and enter the required information for each section. Provide details such as purchasing organization, sales organization, valuation class, and more.
3. Once you have entered all the necessary information, click on the “Save” button to create the material master data.

Congratulations! You have successfully created material master data using SAP transaction OMMS.

Step 4: Exploring Additional Functionality

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

• Change Material Master Data: OMMS allows you to modify existing material master data. You can edit fields such as description, unit of measure, purchasing information, and more. Simply enter the material number and make the necessary changes.
• Display Material Master Data: Use OMMS to display existing material master data by entering the material number and other relevant criteria. This allows you to review and verify the details of a material.
• Mass Maintenance: OMMS supports mass maintenance of material master data, enabling you to make changes to multiple materials simultaneously. This feature saves time and effort when managing a large number of materials.
• Material BOM: You can create and manage material bills of material (BOMs) using OMMS. BOMs define the components required to produce a material and play a crucial role in production planning and execution.

Conclusion

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

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