For this exercise you should attempt to write the basic flow of the use case 'Process Order'.

Use the Use Case Document template to begin writing the text: right click the link and Save As. If you prefer any word processor or you could even write the text in the text comments box for the use case in you case tool.

The following guidelines may help:

	Write short simple numbered sentences.
	Try to stick to interactions across the system boundary.
	As you think of possible alternate flows, add them a alternate flow names, but do not elaborate them. Finish the basic flow first.
	Use the Hurry's Problem Statement as your information source remembering that it is not complete and that you will have to be creative in places.
	Try to visualize the Process Order Screen that the sales assistant will be using. If this is difficult then draw a visual prototype using drawing tools or just pencil and paper.
	The course solution has 23 numbered sentences of which 21 are actual interactions across the system boundary. Don't expect to get all of them but if you have less than 12 then you are probably writing at too high a level.
	Remember that there are two interactions needed with the card transaction system, one to validate the card and the second to execute the transaction.
	If you are having trouble getting started then try using the Step-by-Step outline below.