zero level of data flow diagram in SA & DT

1. CONTEXT DIAGRAM
Software analysis and design tools

2. Presented to
Mam Asma Jameel
Presented by
saman Iftikhar
hira nasir
shahwana fida
2/5/2018 Software enginering 2

3. Outline
Software analysis and design tools
What is context diagrams?
Examples
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4. Software analysis and design tool
 Software analysis and design is the intermediate stage,
which helps human-readable requirements to be
transformed into actual code.
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5. What is Context Diagram?
 Context diagram shows the system boundaries, external entities that
interact with the system, and major information flows between entities
and the system.
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6. Cont.
 Indicate the people, organization and systems which communicate with our system.
 Show the data which our system receives from the outside world.
 Show the data produced by the system and sent to the outside world.
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7. Cont.
 Show the data which is shared by the system with the outside world.
 Show the boundary between the system and the rest of the world.
 It is also called level 0 DFD.
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8. Cont.
 Level-0 DFD shows the system’s major processes, data flows, and data
stores at a high level of abstraction.
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9. Symbols used In context diagram
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process
Entity
Data flow

10. Example 1
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11. Example 2
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12. Example 3
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13. Example 4
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14. 2/5/2018 Software enginering 14
Thank you