Cut over, Parallel System and Trial system

[methodsboy]

^someone please describe what they are 
Also : Why should an audit of the system take place, and what might this involve?
thnx

[ell]

I believe cut-over refers to the implementation stage and the changeover/conversion methods. Changeover/conversion methods are ways of converting an old system to a new system. I'll list and briefly describe the ones you need to know for SD:

Direct	The old system is completely scrapped and the new one is implemented immediately
Phased	The new system is gradually implemented over a period of time (i.e. component by component)
Parallel	The old and new system are run simultaneously until the new system is ready for use.
Pilot (trial)	Instead of implementing the new system throughout the whole organisation, it is only implemented within one section or department.

[methodsboy]

thanks

[excal]

I believe cut-over refers to the implementation stage and the changeover/conversion methods. Changeover/conversion methods are ways of converting an old system to a new system. I'll list and briefly describe the ones you need to know for SD:

Direct	The old system is completely scrapped and the new one is implemented immediately
Phased	The new system is gradually implemented over a period of time (i.e. component by component)
Parallel	The old and new system are run simultaneously until the new system is ready for use.
Pilot (trial)	Instead of implementing the new system throughout the whole organisation, it is only implemented within one section or department.

This is correct.