Connie's Convenience Store - About Peter Coad

68 Connie’s Convenience Store Selecting Human-Interaction objects
Window objects for this system
What’s needed at Connie’s Convenience Store?
– a logon window
– a transaction window
– a sale (and payment) window
– some transaction participant windows
a store window
a cashier window
a register window
a cash drawer window
a tax category window
a UPC window
an item (and price) window
– a results window
a store assessment window.
Select reports
What kind of reports might you need?
– legally required reports
– business-required reports.
You don’t need to attempt to model all of the reports you may eventually get with
ad hoc queries to a database. That would be silly. You don’t need batch-checking reports
of an existing system. You don’t need hardcopy “nut and bolts” like printers.
Report objects for this system
What’s needed this time?
#31. “Select Reports” Strategy selecting objects (model components)
• Put together key summaries and specialized outputs, meeting specific legal or business
needs.
• Look carefully at who (audience) needs what (content), and why (purpose).
• Don’t include every ad hoc query that someone might eventually ask; don’t include
outdated batch reports.
A cashier works with one important report:
– a receipt.
What other reports do you need? Check out the system features. These reports support
those objectives:
– a store report
– an item report
– a cashier report
where each report spans a requested time interval, whatever that interval might be.