Nope, it can be as random, as long as in the end, the 10,000 customers will be equally assigned to the staff based on their group. But of course, if you follow by sequence, the customers will still be equally assign. In a simpler example, let's say I have 10,000 customers, how do I equally assign these 10,000 customers to 10 staffs? If there's a uniform distribution assignment, we can expect each staff to receive around 1000 customers each. How do I do this in SAS data step? To complicate things, each customer and staff have their own group.
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