1. Conversion Strategies

2. Four Possible Methods Abrupt Cutover Parallel Conversion
Location Conversion
Staged Conversion

3. Abrupt Cutover
As of a specific date the new system is installed.No Looking Back
Previous versions of the text called this the “Crash” method.

4. Abrupt Cutover Advantages
Lowest Cost (If it works)
Ensures everyone uses new system
Benefits achieved at earliest possible time

5. Abrupt Cutover - Disadvantages
Highest Risk

6. Parallel Conversion
Run both the old and new systems for a specified period of time.

7. Parallel Conversion Advantages
Safest Method
Major problems resolved before implemented

8. Parallel Conversion - Disadvantages
Highest Cost
High Demand on Resources
Potential to “hang on’ to old system

9. Location Conversion May convert with one (or more) locations at a time
First site is called a “Beta” site

10. Location Conversion - Advantages
Minimizes Risk
Bugs worked out at first location
Remaining sites can usually convert by abrupt method.

11. Location Conversion _ Disadvantages
Delays benefits
Increased Cost
Must co-exist with existing system
Implementation Team committed longer
Costs higher

12. Staged Conversion
Various portions or versions of the system are installed one a t a time
Each version is installed as it becomes available

13. Staged Conversion - Advantages
Relatively safe
Able to resolve problems on a limited scale
Minimizes immediate impact on users

14. Staged Conversion - Disadvantages
High Cost
Resources committed Longer
Must maintain previous systems
Benefits Delayed
Problems encountered in new releases may require correcting previous systems implemented

15. Reminder
Your team must select one or a combination of these methods for your team project