Presumably the customer would pay in advance - by Direct Debit and the +ve balance would be held in the accounts system. When they ordered would they only be allowed to order up to their existing balance? Would you expect GOb2b to alter the balance or would that be done when the goods were dispatched, which makes more sense as GOb2b only know what you are reporting in stock and not what you will actually dispatch. How would you deal with customers that also ordered off subscription - would they have a separate account for that? If they did not how would GOb2b be able to determine the subscription balance?
This would be a significant project.
Presumably the customer would pay in advance - by Direct Debit and the +ve balance would be held in the accounts system. When they ordered would they only be allowed to order up to their existing balance? Would you expect GOb2b to alter the balance or would that be done when the goods were dispatched, which makes more sense as GOb2b only know what you are reporting in stock and not what you will actually dispatch. How would you deal with customers that also ordered off subscription - would they have a separate account for that? If they did not how would GOb2b be able to determine the subscription balance?