Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
Documentation |
Narratives, flowcharts, diagrams, and other written materials that explain how a system works |
|
|
Narrative Description |
Written step by step explanation of system components and interactions |
|
|
What are documentation tools used for |
Read Evaluate Prepare |
|
|
Data Flow Diagram (DFD) |
A graphical description of the source and destination of data that shows data flow within an organization, the processes performed on the data, and how it is stored. |
|
|
Document Flowchart |
A graphical description of the flow of documents and information between departments or areas of responsibility within an organization |
|
|
System Flowchart |
A graphical description of the relationship among the input, processing, and output in an information system |
|
|
Prgram flowchart |
A graphical description of the sequence of logical operations that a computer performs as it executes a program. |
|
|
Two most frequently used system development and documentation tools |
Data flow diagrams and flowcharts |
|
|
What is a DFD used for? |
Document existing systems and plan and design new ones |
|
|
What are the four basis elements of a DFD? |
Data sources and destinations Data flows Transformation processes Data stores |
|
|
What does a source of destination symbol on the DFD represent? |
An organization or individual that sends and receives data that the system uses or produces |
|
|
Data Flow |
Represents the flow of data between processes, data stores, and data sources and destinations. |
|
|
Processes |
Represent the transformation of data. |
|
|
Data Store |
Temporary or permanent repository of data |
|
|
Context diagram |
Provides the reader with a summary level view of the system |
|
|
Guide for drawing a DFD (1-5) |
Understand the system Ignore certain aspects of the system Determine system boundaries Develop a context diagram Identify data flows |
|
|
Guide for drawing a DFD (6-10) |
Group data flows Identify transformation processes Group transformation processes Identify all files and data stores Identify all data sources and destinations |
|
|
Guide for drawing a DFD (11-15) |
Name all DFD elements Subdivide the DFD Give each process a sequential number Repeat the process Prepare a final copy. |
