How do I prove to my colleagues that the restored (reference) copy of the FICO system is a true and accurate copy of actual production before I make the changes to my production system? In other words, how do I prove that the backup is good, and the restored system and business data in both systems is identical?
I have written an ABAP tool to reconcile between my production and reference systems, as well as between all companies and FICO ledgers over an eight-year period. The current signoff is that if they both come out the same after reconciliation then this is good proof that they are identical.
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You should, however, consult with your business users. I have several customers who run a set of reports to verify data consistency. These reports take about 30 minutes, as they verify a specific set of data. It makes no sense to verify eight years of business data.
This was first published in January 2009