OPA1 is a SAP tcode coming under PP module and SAP_APPL component. View some details about OPA1 tcode in SAP.
- OPA1 tcode used for : Maintain combination definitions in SAP
- Module : PP-CRP-LVL (Capacity Leveling)
- Parent Module : PP (Production Planning and Control)
- Package : CY0C (Customizing Capacity Planning)
- ABAP Program :

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Definitions
What is SAP ?SAP is the short form of Systems, Applications & Products in Data Processing. It is one of the largest business process related software. This software focused on business processes on ERP & CRM.
What is transaction code in SAP?Transaction code shortly known as tcode, is a shortcut code to access different functional areas in SAP. It avoid users from long menu path to reach a report. Instead of that users can type the corresponding transaction code and press enter, the corresponding SAP page will load. It’s a good practice to remember or note down the transaction codes that we need to use in our regular work.
OPA1 related transaction codes
| Tcode | Note | 
|---|---|
| OPA1 | Maintain combination definitions | 
| JZ33 | Maintain date combination (fixed) | 
| JZ43 | Maintain Date Combination (Flexible) | 
| MDP1 | Create combination structure | 
| MDP2 | Change combination structure | 
| MDP3 | Display combination structure | 
| S_KK4_96000192 | IS-H: Evaluate ICPM/ICD Combination | 
| S_B71_29000005 | (empty) | 
| CACS_DET_WUL_COMB | Determ: Where-Used List(Combination) | 
| ORPS3 | Qty/Error Combination for Confirm. | 
| S_XB7_96000096 | CoCode/Acctng Principle Combination | 
| /SAPMP/OATRKZ_PLA_OC | Work Center for Order Combination | 
| JITO | Check Delivery Combination | 
| MILL_OC | Create Order Combination | 
| CXN3 | Rules for ID Combination |