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10 Cards in this Set
- Front
- Back
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Describe data and process modeling concepts. |
Graphical models developed to show how the system converts data into valuable information. The end result is a logical model that supports business operations and meets user’s needs. Data and process modelling involves three main tools: data flow diagrams, a data dictionary, and process descriptions. |
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Describe data and process tools. |
Data Flow Diagrams (DFD) Data Dictionary Process Descriptions |
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Describe Data Flow Diagrams (DFD)
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Diagrams showing how data is processed, transformed, and stored in an information system. It does not show program logic or processing steps. |
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Describe Data Dictionary |
It is a centralized storehouse of information about the system's data. It is used to define and describe all data elements and relationships of each element. |
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Describe Process Descriptions |
Used in the documentation of the processes. This includes the input and output data flows. For functional primitives, the process description also documents the processing steps and business logic. |
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Explain the differences between Gane and Sarson and Yourdon symbols. |
Gane and Sarson Process represented as a rectangle with rounded corners Yourdon Process represented as a circle Data Flow represented as an arrow for each model types Gane and Sarson Data Store represented as a rectangle with smaller box to the left. Yourdon Data Store represented as a rectangle. Gane and Sarson External Entity represented as three-dimensional box. Yourdon External Entity represented as a two-dimensional box. |
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Explain BPM. |
Business Process Management. Businesses need to be efficient and effective, while having the ability to adapt and maneuver through a competitive landscape. BPM is a method of reviewing the relationships between systems and procedures and is not limited to information technology. |
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Explain what is meant by the context diagram. |
A model diagram that is a high level view of a system that defines the boundaries between the system and its environment. |
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What is a Primitive (Elementary) DFD? |
A decomposition diagram giving the greatest detail for an event process. |
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When would you use Primitive (Elementary) DFD? |
It is most often used for complex business transaction processes, in order to decompose each process into multiple elementary processes. Each elementary process is cohesive and only does one thing. This is the lowest level view of a system. |
