<6. User Acceptance Test>
6.2 Items Requiring Prior Explanation to Users
If there are differences between the equipment to be used for UAT and the actual
system, it is necessary to obtain prior consent of the user by explaining what the
differences are, how the differences are to be tested, and what possible problems
may arise.
6.2.1 Differences in Equipment Used from Actual System
As explained in Section 5.4.2, “Equipment Used for Combination Test,” even if
function test is started using in-house equipment, it is recommended migrating to
target equipment when moving from unit test phase to system-wide testing in
combination test phase.
If UAT is also carried out using target equipment, this will allow testing conditions to
approach the actual system.
Nevertheless, UAT sometimes has to be performed by in-house equipment for
various reasons such as early shipment of target equipment for convenience of
construction and installation or non-availability of production equipment when
implementing modifications to an existing system.
As described in Section 5.1, “Equipment Used for Testing,” if UAT is carried out by
in-house equipment, it is highly likely that there are differences from the actual
system.
Where there are differences, investigate whether such differences will present
problems during UAT, how the affected parts are to be tested, etc. and report the
results to the user for their prior consent.
If early shipment of target equipment is required for convenience of construction or
installation, unless the system on site is scheduled to be powered on by the time the
control application is delivered, deliver the FCN-500 or FCN-RTU without the CPU
module.
If the CPU module of the target equipment can be used during UAT, it would simplify
system delivery after UAT.
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