You can extend the Master Data Governance, Consolidation app according to your business needs for different aspects. For this purpose, the following extensibility options are available:
Add customer-specific fields using the existing customer include INCL_EEW_BUT000 in the database table but000.
Extension fields defined in this customer include are made available on the SAP Fiori UI without further activities.
Add customer-specific fields using APPEND structures.
In this case you need to extend the class CL_MDC_PROCESS_MPC_EXT and the method ENHANCE_DETAILS_ENTITIES to account for the new fields.
For a general description of the extensibility options and procedures of SAP Fiori apps, see http://help.sap.com/fiori_implementation .