Page 83 - E1 Integrated Workbook STUDENT 2018

The purpose and management of the technology and information
function

6.3 Changeover

Four methods of
system changeover

Direct Parallel Pilot Phased
 Appropriate  Appropriate  Appropriate  Appropriate
when there is when the when the when the

confidence system has system can system can
in the new not been be operated be
system or is used in different implemented
not a critical elsewhere or geographical in distinct
business it is a critical regions. parts.
system. business  Cheaper and  Less risky
 Cheap and system. easier to than direct,
convenient  Provides a control than spreads cost
but high risk. degree of parallel and and gives the
safety but less risky organisation
can be more than direct. time to
expensive adapt.
and difficult
to reconcile

systems.

A post-implementation review should be carried out to establish if
the objectives of the new system are being achieved.

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