Unformatted text preview: roblem DS5: Data stores could not be placed out of system In logical DFD, the type of physical storage is not specified. Context Diagram C1: contains only one process, representing the entire system. C2: it must not contain any data stores. C3: All external entities must be shown. this is the most important part item of this list. (Customer, e‐
payment companies, bank, suppliers ..) C4: major data flow to and from external entities must be shown. C5: it must not contain internal departments the process is given the number zero. Level 0 L1: I/Os in the context remain constant. Yo...
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This homework help was uploaded on 04/04/2014 for the course COMM 436 taught by Professor Carsonwoo during the Fall '12 term at UBC.
- Fall '12