I'm at a client site where TMM 2.01.05.32 will be evaluated. Currently, the data mapping process is comprised of a single excel spreadsheet that accommodates 3 versions of a given table. From that spreadsheet (1 per source data spec), three different ERwin models are created. File (inbound as-is), Stage (transformation layer), and Base (final target DB).
What's Teradata best practice for setting up TMM given the above scenario?
1 project per inbound spreadsheet with 3 subject areas (file, stage & base) to accommodate the three entities/tables created?
1 project per per each unique table structure? i.e., 3 projects per table
FYI - inbound spec is the driver for the File table, File table drives the Stage table and Stage drives the Base table structure. The spreadsheet defines the source attribute names, and what attributes should flow to each table version.
Any thoughts as to the best way to setUP TMM to work with the above?
Thanks for any insight or help offered.
Wayne