Context diagram

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 1/17/2018 Software enginering 2

3. Outline Software analysis and design tools What is context diagrams? Examples 1/17/2018 Software enginering 3

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. 1/17/2018 Software enginering 4

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. 1/17/2018 Software enginering 5

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. 1/17/2018 Software enginering 6

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. 1/17/2018 Software enginering 7

8. Cont . Level-0 DFD shows the system’s major processes, data flows, and data stores at a high level of abstraction. 1/17/2018 Software enginering 8

9. Symbols used In context diagram 1/18/2018 Software enginering 9 process Entity Data flow

10. Example 1 1/17/2018 Software enginering 10

11. Example 2 1/17/2018 Software enginering 11

12. Example 3 1/17/2018 Software enginering 12

13. Example 4 1/18/2018 Software enginering 13

14. 1/17/2018 Software enginering 14 Thank you