A. Greenfield (AKA: Start from scratch): Systems to be merged will not be in operative use afterwards. A new system with a new organizational structure and processes will be created. In case of a "selective" migration, access to source systems for historical information is required.

B. In the Supplier filter field, enter your supplier/employee number and select Go. You see two items open, the invoice and the partial payment. No clearing has taken place.

C. Blackfield (AKA Pure technical n to 1): One system will be identified as "leading" system, others will be merged into that. All existing processes and organizational structures will be adjusted in case of conflicts. In general all data will be migrated

D. Brownfield (AKA: Pick up best scenarios within company): Systems to be merged will not be in operative use afterwards. A new system with a new organizational structure, but existing processes, is be created. In case of a "selective" migration, access to source systems for historical information is required.