In this version of the template, I write Sub-Variation as an attempt to make it more distinct from Extensions. Refer to the original paper. The Word binary of this document may be available on the web site. Buyer issues request directly to our company, expects goods shipped and to be billed. We know Buyer, their address, etc.
Buyer calls in with a purchase request.
Company captures buyer's name, address, requested goods, etc. Company gives buyer information on goods, prices, delivery dates, etc. Buyer signs for order. Company creates order, ships order to buyer. Company ships invoice to buyer.