Page 83 - E1 Integrated Workbook STUDENT 2018
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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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