1. Information Systems Analysis and Design
Chapter 10
Information Systems Analysis
and Design
Chapter 10: Information Systems Analysis and Design

2. Chapter 10: Information Systems Analysis and Design
Information Systems in Organizations
Transaction Processing Systems
Management Information Systems
Decision Support Systems
Expert Systems and Neural Networks
Chapter 10: Information Systems Analysis and Design

3. Information Systems in Organizations
Figure 10-1
Chapter 10: Information Systems Analysis and Design

4. Information Systems in Organizations
Organizational Chart
Figure 10-2
Chapter 10: Information Systems Analysis and Design

5. Information Systems in Organizations
Information systems can:
Automate routine tasks
Solve problems
Collect and store internal or external information
Chapter 10: Information Systems Analysis and Design

6. Transaction Processing Systems
Provide a way to collect, process, store, display, modify, or cancel transactions
Batch processing vs. online processing
Detail reports
Chapter 10: Information Systems Analysis and Design

7. Transaction Processing Systems
Transaction Processing System (TPS)
Figure 10-5
Chapter 10: Information Systems Analysis and Design

8. Management Information Systems
Figure 10-6
Chapter 10: Information Systems Analysis and Design

9. Decision Support Systems
What is a DSS?
Chapter 10: Information Systems Analysis and Design

10. Decision Support Systems
Figure 10-9
Chapter 10: Information Systems Analysis and Design

11. Expert Systems and Neural Networks
Knowledge base
Inference engine
Expert system shell
Fuzzy logic
Neural Network
Chapter 10: Information Systems Analysis and Design

12. Chapter 10: Information Systems Analysis and Design
System Development Life Cycle
Planning Phase
Analysis Phase
Documentation Tools
Chapter 10: Information Systems Analysis and Design

13. System Development Life Cycle
Waterfall SDLC
Modified Waterfall SDLC
Iterative SDLC
Figure 10-13
Chapter 10: Information Systems Analysis and Design

14. Chapter 10: Information Systems Analysis and Design
Planning Phase
Justification for new system usually emerges from a serious problem with the current system
Figure 10-17
Chapter 10: Information Systems Analysis and Design

15. Chapter 10: Information Systems Analysis and Design
Planning Phase
Create a Project Development Plan
Project management software
Joint application design (JAD)
Figure 10-14
Chapter 10: Information Systems Analysis and Design

16. Chapter 10: Information Systems Analysis and Design
Planning Phase
Development methodologies
PERT (Program Evaluation and Review Technique)
WBS (Work Breakdown Structure)
Gantt chart
Chapter 10: Information Systems Analysis and Design

17. Chapter 10: Information Systems Analysis and Design
Planning Phase
Figures and 10-19, and 10-20
Chapter 10: Information Systems Analysis and Design

18. Chapter 10: Information Systems Analysis and Design
Analysis Phase
Produce a list of requirements for a new or revised information system
Analysis phase activities
System requirements are the criteria for successfully solving problems identified in an information system
Chapter 10: Information Systems Analysis and Design

19. Chapter 10: Information Systems Analysis and Design
Documentation Tools
The core documentation tool for project teams using structured methodology is the data flow diagram (DFD)
External entity
Process
Data store
Data flow
Figure 10-23
Chapter 10: Information Systems Analysis and Design

20. Chapter 10: Information Systems Analysis and Design
Documentation Tools
Figure 10-24
Chapter 10: Information Systems Analysis and Design

21. Chapter 10: Information Systems Analysis and Design
Documentation Tools
The current standard for object-oriented documentation is called UML
Use Case Diagram
Class Diagram
Sequence Diagram
Chapter 10: Information Systems Analysis and Design

22. Chapter 10: Information Systems Analysis and Design
Documentation Tools
CASE tools help project team
members manage all the details of system documentation. In this example, the project team is developing a course registration system. The top screen shows how the CASE tool helps developers create a complete
specification by pointing out missing elements in the design. The second screen shows how the CASE tool generates program code.
Figure 10-28
Chapter 10: Information Systems Analysis and Design

23. Chapter 10: Information Systems Analysis and Design
System Design
Design Phase
Evaluation and Selection
Application Specifications
Chapter 10: Information Systems Analysis and Design

24. Chapter 10: Information Systems Analysis and Design
Design Phase
Determine how the new system will fulfill the requirements specified in the Analysis Phase
Figure 10-29
Chapter 10: Information Systems Analysis and Design

25. Chapter 10: Information Systems Analysis and Design
Design Phase
Consider the following when evaluating hardware alternatives
Level of automation and computerization
Processing methodology
Network technology
Figure 10-30
Chapter 10: Information Systems Analysis and Design

26. Chapter 10: Information Systems Analysis and Design
Design Phase
Software alternatives
Programming language
Application development tool
Commercial software
Turnkey system
Figure 10-31
Chapter 10: Information Systems Analysis and Design

27. Application Specifications
Describe the way the information system’s software should interact with users, store data, process data, and format reports
Feature creep/Scope creep
Chapter 10: Information Systems Analysis and Design

28. Implementation and Maintenance
Implementation Phase
Development and Testing
Documentation and Training
Conversion and Cutover
Maintenance Phase
Chapter 10: Information Systems Analysis and Design

29. Chapter 10: Information Systems Analysis and Design
Implementation Phase
Project team supervises the tasks necessary to construct the new information system
Figure 10-36
Chapter 10: Information Systems Analysis and Design

30. Development and Testing
Software Customization
Application testing is performed in three ways
Chapter 10: Information Systems Analysis and Design

31. Development and Testing
Figure 10-37
Chapter 10: Information Systems Analysis and Design

32. Documentation and Training
System documentation
User documentation
Procedure handbook
Chapter 10: Information Systems Analysis and Design

33. Conversion and Cutover
System conversion
Several conversion strategies:
Direct conversion
Parallel conversion
Phased conversion
Pilot conversion
Acceptance testing
Chapter 10: Information Systems Analysis and Design

34. Chapter 10: Information Systems Analysis and Design
Maintenance Phase
Involves day-to-day operation of the system, making modifications to improve performance, and correcting problems
Figure 10-40
Chapter 10: Information Systems Analysis and Design

35. Chapter 10: Information Systems Analysis and Design
Maintenance Phase
System Operator
Systems Programmer
Help Desk
Chapter 10: Information Systems Analysis and Design

36. Chapter 10: Information Systems Analysis and Design
Maintenance Phase
Maintenance phase costs
Figure 10-43
Chapter 10: Information Systems Analysis and Design

37. Corporate Data Security
Information System Data Vulnerabilities
Information System Data Security
Corporate Identity Theft
Chapter 10: Information Systems Analysis and Design

38. Information System Data Vulnerabilities
Threats to a corporate information system can affect thousands of people
Natural disasters
Power outages
Hardware breakdowns
Human errors
Software failures
Security breaches
Acts of war
Viruses
Figure 10-44
Chapter 10: Information Systems Analysis and Design

39. Information System Data Security
No computer system can be completely risk-free, but several proactive measures can protect information systems from threats
Figure 10-45
Chapter 10: Information Systems Analysis and Design

40. Information System Data Security
Data Center
Disaster Recovery Plan
Figure 10-46
Chapter 10: Information Systems Analysis and Design

41. Information Systems Analysis and Design
Chapter 10 Complete
Information Systems Analysis
and Design
Chapter 10: Information Systems Analysis and Design