1. Chapter 5 Systems Analysis Systems analysis in the SDLC Systems analysis steps Existing system documentation In-depth personal interviews Surveys Group collaborative sessions Observation Functional requirements documentation

2. Systems analysis in the SDLC Fig 5.1: Analysis Phase Overview

3. Systems Analysis Steps Basic step 1: Analyze functional requirements Analyze existing system documentation Conduct in-depth personal interviews Conduct surveys Gain consensus among group members Observe the existing system Search through records

4. Existing System Documentation Reports and screens Process modeling tools DFD context diagram Fig 5.2: A Context Diagram for an Order Entry System

5. Existing System Documentation Process modeling tools DFD figure 0 diagram Fig 5.3: Figure 0 Diagram for an Order Entry System

6. Existing System Documentation Process modeling tools Structured English Fig 5.4: Structured English

7. Existing System Documentation Process modeling tools System flowchart Fig 5.5: A System Flowchart

8. Existing System Documentation Process modeling tools Program flowchart Fig 5.6: A Program Flowchart

9. Existing System Documentation Process modeling tools Warnier-Orr diagram Fig 5.7: A Warnier-Orr Diagram

10. Existing System Documentation Data modeling tools Layout form Fig 5.9: A Record Layout Form

11. Existing System Documentation Data modeling tools Data dictionary ERD Fig 5.11: An Entity-Relationship Diagram

12. Existing System Documentation Object modeling tools Object class diagram Fig 5.12: Class Diagram for Ordering Replenishment Stock

13. In-Depth Personal Interviews Structured and unstructured Tips Make an appointment Dress properly Have an agenda and use a question list Be flexible Use a tape recorder Validate the responses

14. Surveys Personal and Telephone Objective and subjective Tips 1.Keep the questionnaire short 2.Ask easy questions first 3.Follow the proper sequence Mail Tips 1.Keep the questionnaire short 2.Personalize the mailing 3.Use the telephone for follow-up 4.Use scales

15. Group Collaborative Sessions DSS, GDSS, GSS EMS (electronic meeting system) JAD Nominal group technique (NGT) 1.Generate ideas 2.List ideas in round-robin fashion 3.Discuss ideas 4.Each member ranks ideas 5.Compile rankings 6.Discuss and accept rankings Focus groups

16. Observation Tips Be inconspicuous Observe a representative work flow

17. Systems Analysis Steps Basic Step 2: Document Functional Requirements F/C matrix Use case The project dictionary

18. Functional Requirements Documentation Use case Fig 5.14: A Use Case

19. Functional Requirements Documentation The project dictionary Table 5.1: Contents of the Project Dictionary Created During Analysis Activities