Conversion is the process of switching from the old (computer or manual) system to the new Information System. There are four conversion methods.

Parallel conversion. Where you run both the new and the old for a time before switching off the old.

Pilot conversion. Where you implement and test the new system, on a small scale in one business unit, then you expand the conversion to include all of the other business units.

Phased conversion. Where over time you gradually use more of the new and less of the old until you are completely converted.

Direct (Plunge in diagram) conversion. Where you switch off the old and switch on the new at the same time.

1. Explain which of the conversion methods would be suitable for the following. Justify your choice:

• Upgrading the software for an Automatic Banking Machine (ABM/ATM)
• Adding a new inventory system along with new computerized cash registers in a supermarket
• Implementing a student course management system in a university

2. List four reasons why your participation as a user of an information system is critical during the systems development life cycle, linking the concepts of user involvement and change management in a software implementation project.

3. Why is it so important to understand how a business process works when trying to develop a new information system?