SAP Supersession Chains Transaction Codes - IS-A-SUS TCodes SAP Supersession Chains (IS-A-SUS) TcodesTcodeDescriptionModuleOPIC1Specify system messagesIS-A-SUSPIC01Maintain Parts InterchangeabilityIS-A-SUSPIC03Display Parts InterchangeabilityIS-A-SUSPIC31PIC : Mass maintenance for MPN SetsIS-A-SUS