Description:
This is a high level Narrative and Data Flow Diagram of the application’s main business functions depicting for each the data flows, data storage and the outside entities and their interaction. Includes narratives to describe the data flow within each major function. Provides the application support analyst a detailed narrative and diagrammatic view of all major application components, data structures and their interactions. This helps the support analyst understand the detailed design of the application that is needed for communication within the department to modify application components or fix application components that fail.
Provides understanding of the structure of the system; describes relationships between subsystems; describes primary modules within subsystems.
How is it used?
Provides the application support analyst a detailed narrative and diagrammatic view of all major application components, data structures and their interactions. This helps the support analyst understand the detailed design of the application which is needed for communication within the department, modifying application components or fixing application components that fail.
Why is it important?
(1) Describes the Applicaiton Functions, Databases / Transactions and Operating Environment and how they interact.
(2) Provides understanding of the structure of the system; describes relationships between subsystems; describes primary modules within subsystems.
(3) Most application systems and its subsystem documentation “are missing basic purpose and explanation of why and how system elements are different from others within the overall application inventory and structure”.
(4) Generally existing documentation doesn’t have enough narrative detail or a diagrammatic view show how all the system components interact, to help the support analyst understand how the application is put together and functions as an integrated unit regardless how many sub- components make up the application.
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