System_Design coding testing implemention and maintaince.pptx

System Design Phase
Logical and Physical model of new system
Logical Design
Physical Design
Report
Importance of Testing Phase
Detect and remove errors
1. Unit Testing
2. System Testing
Types of System Implementation
1. Parallel Conversion
2. Pilot Conversion
3. Phased Conversion
4. Direct Conversion
Importance of User Training

1. Preliminary investigation System Analysis System Design system Coding System Testing System Implementation System Maintenance SDLC

2. System Design Phase Logical and Physical model of new system state how the new system will Meets requirements from analysis phase

3. Logical Design Describes general functional capabilities Reviews system requirements and components Uses CASE tools and project management software

4. Physical Design Details how system will deliver capabilities Specifies: Output requirements Input requirements Storage requirements Processing requirements System control Backup and Recovery procedures

5. Report Detailed report at end of design phase Submitted for approval

6. Importance of Testing Phase Detect and remove errors Tested by giving sample data Two stages: 1. Unit Testing Also known as module testing Tests individual units/modules with sample data 2. System Testing Combines all modules/units Tests complete system

7. Types of System Implementation After testing, also known as system conversion Methods: 1. Parallel Conversion Both old and new systems operate together Safest type Compare results, use old system until issues resolved

8. Types of System Implementation 2. Pilot Conversion One part uses new system, rest use old system Rest of organization switches after satisfaction

9. Types of System Implementation 3. Phased Conversion Implement new system components one by one 4. Direct Conversion Old system directly replaced by new system Most risky, used when time is short Also called crash conversion

10. Importance of User Training Essential for successful operation Proper training needed to use new system Manuals and reference information Computer-based training (CBT) popular