Exam 9: Process Modeling

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Structured English should be precise enough to clearly specify the required business procedure to a programmer or user. But it should not be so inflexible that you spend hours arguing over syntax.

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In data flow diagrams, arrows represent___________________________ .

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_________________________ models show not only what a system is or does, but also how the system is technically implemented. They are implementation dependent because they reflect technology choices and limitations of those technology choices.

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A system is a process.

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A control flow represents a condition or non-data event that triggers a process.

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The context diagram is constructed for event processes that require additional processing details. These data flow diagrams include all the elementary processes, data stores and data flows for single events.

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Events are sometimes called transactions.

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Logical models:

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Structured English is built using the following three fundamental constructs that have governed structured programming: (1) ____________________________________________________ (2) ______________________________________________________ and (3) ________________.

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In data flow diagrams, open-ended boxes represent external agents.

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Another name for a data flow diagram is:

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Elementary processes are at the highest level of detail when depicted in a process model.

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Physical models show not only what a system is or does, but also how the system is physically and technically implemented. They are implementation independent because they specify the technology.

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Each logical process must be implemented in software.

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A system context diagram is constructed to establish initial project scope.

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A logical process can use stored data to create, read, update or delete a record.

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For each use case we need to list: (1) _________________________________ (2) _____________________ (3) ______ and (4) ___________.

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A composite data flow is a data flow that consists of other data flows.

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Data stores are data in motion, and data flows are data at rest.

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A black hole is an acceptable elementary process.

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