IBM SG24-7368-00 manual Enterprise operation Initiate New Sale, Operation specification example

Enterprise operation: Initiate New Sale

￿Black-box perspective:

–Clerk starts new sale

–The system enables the scanner

￿White-box perspective:

–The Point-of-Sale subsystem clears the transaction, brings up a new sales screen, and requests the Order Processing subsystem to create a new sales list

–The Order Processing subsystem starts a new sales list

–The Point-of-Sale subsystem enables the scanner

So that we can add additional items to the white-box expansion, we use a tabular format for an operation specification such as Figure 4-3.This template can be customized to meet the needs of specific modeling situations.

Figure 4-3 Operation specification example

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