1 / 14

Conversions

Conversions. The process of phasing out the old system and starting up the new system Four Approaches Parallel Pilot or Single Location Installation Phased Plunge or Direct. Parallel Installation.

ula
Download Presentation

Conversions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Conversions • The process of phasing out the old system and starting up the new system • Four Approaches • Parallel • Pilot or Single Location Installation • Phased • Plunge or Direct Implementation

  2. Parallel Installation Running the old information system and the new one at the same time until management decides the old system can be turned off

  3. Parallel Conversion • Both the old and new systems are operated together until IS, end users, and managers determine that the new system is functioning correctly • Output of one system is compared to the output of the other • Old system can be considered a backup for the new system if there is a massive problem • Use with CRITICAL applications Implementation

  4. Parallel Conversion • Advantages • Safest • Strong end user satisfaction and approval • Disadvantages • Cost of using two systems • Computer time and personnel resources • End users are oppose to double work for IS validation Implementation

  5. Pilot of Single Location Installation Trying out a new information system at one site and using the experience to decide if and how the new system should be deployed throughout the organization

  6. Pilot Conversions • Test the new system out in part of the firm • Use with “brand new” applications in the firm • Use with new hardware • Similar to the concept of test marketing Implementation

  7. Pilot Conversion • Advantages • Negative impart of software error is minimized • Personnel in trial area can assist other personnel in the changeover • Disadvantages • IS specialists must maintain two systems Implementation

  8. Phased Installation Changing from the old information system to the new one incrementally, starting with one or a few functional components and then gradually extending the installation to cover the whole new system

  9. Phased Installation - Two Approaches • Install a few functions at a time • Example: student record system • Registration • Textbooks • Student Transcripts • Graduation Validation • Install the main (basic functions) but without “toots and whistles” • Student Registration • Add/Drop classes • Time conflicts • Pre-requisites

  10. Phased Conversions • Implement part of an application at one time • Gradual implementation is preferred with very large and complex systems Implemenation

  11. Phased Conversions • Advantages • Users can reap the benefits of part of the system before the entire system is completed • Users see part of the system faster • An error in one part of the system can be corrected in the other parts before implementation • Disadvantages • May need interfaces between new and old system ($$, time to develop interfaces) Implementation

  12. Plunge or Direct Installation Changing over from the old information system to a new one by turning off the old system when the new one is turned on

  13. Plunge Conversions • Stop the old and start the new • Use if the old system is no longer available • hardware failure • massive user requirement changes Implementation

  14. Plunge Conversion • Advantages • Cheapest • Easiest from user viewpoint • Disadvantages • Riskiest (no backup in case of severe error) • Requires extensive planning and testing Implementation

More Related