Question: We are going to change the numbering format for our customers for DB across the organization. Now we are using four digits CR NN C - Country R - Region N - current customer number. CC RR NN. Could you please advise what we need to consider before starting the project?
Adrienne Tannenbaum's Answer: Intelligent identifiers (what you have here) always get you into trouble. If in fact, customers are currently identified as a combined country, region, customer number grouping, what do you do when a customer leaves a particular region to relocate? If you need to keep the same customer number, what if there is already a customer in the new country/region that has that customer number? What do you do when your regions get redefined? I could go on and on but you are asking for trouble if you have not experienced it yet.
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