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Definition
| a pictorial representation of reality. |
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Definition
| a nontechnical pictorial representation that depicts what a system is or does. Synonyms are essential model, conceptual model, and business model. |
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| a technical pictorial representation that depicts why a system is or does and how the system is or does and how the system is implemented. Synonyms are implementation model and technical model. |
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Definition
| a technique used to organize and document a system's processes. |
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Definition
| a process model used to depict the flow of data through a system and the work or processing performed by the system. Synonyms are bubble chart, transformation graph, and process model. |
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Definition
| there are several competing symbol sets for DFDs. Throughout this chapter, the authors have chosen to use the Gane and Sarson notation because of its wide popularity. |
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Definition
| an outside person, organization unit, system, or organization that interacts with a system. Also called external entity. |
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Definition
| stored data intended for later use. Synonyms are file and database. |
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Definition
| work performed by a system in response to incoming data flows or conditions. A synonym is transformed |
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Definition
| the act of breaking a system into subcomponents. |
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Definition
| a set of related and ongoing activities of a business. |
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Definition
| a logical unit of work that must be completed as a whole. Sometimes called a transaction |
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Definition
| discrete, detailed activity or task required to complete the response to an event. Also called primitive process. |
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Definition
| data that is input or output to or from a process. |
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Definition
| a data flow that consists of other data flows. |
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Definition
| a condition or nondata event that triggers a process. |
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Definition
| the smallest piece of data that has meaning to the users and the business. |
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Definition
| a specific arrangement of data attributes that define a single instance of a data flow. |
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Term
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Definition
| a class of data that can be stored in an attribute |
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Definition
| the legitimate values for an attribute. |
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Definition
| a data flow that splits into multiple data flows. |
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Definition
| the merger of multiple data flows into a single data flow. |
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Definition
| a structured analysis strategy in which a system is factored into subsystems based on business events and responses to those events. |
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Definition
| a diagram that shows the system as a :black box" and its main interfaces with its environment. |
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Term
| functional decomposition diagram |
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Definition
| a diagram that partitions the system into logical subsystems and/or functions. |
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Term
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Definition
| a list of the business events to which the system must provide a response similar to a use-case list. |
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Definition
| a process that handles a given event in the event-response list. |
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Term
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Definition
| a data flow diagram for a single event handler and the agents and data stores that provide inputs or receive outputs |
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Term
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Definition
| a data flow diagram that merges event diagrams for the entire system or part of the system. |
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Term
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Definition
| a data flow diagram that depicts the elementary processes, data stores, and data flows for a single event. |
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Term
| context data flow diagram |
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Definition
| a process model used to document the scope for a system. Also called environmental model. |
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Definition
| an analysis tool for finding and identifying business events and responses. |
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Definition
| a data flow diagram that depicts the context for a single event. |
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Definition
| a concept that requires that data flow diagrams at different levels of detail reflect consistency and completeness. |
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Definition
| a language syntax for specifying the logic of a process. |
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Definition
| a set of rules that governs how a process is to be completed. |
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Term
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Definition
| a tabular form of presentation that specifies a set of conditions and their corresponding actions. |
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Term
| process-to-location association matrix |
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Definition
| a table used to document processes and the locations at which they must be performed |
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