From Page 57
(2) Very good.
The preliminary design process is the best and most
important time to conduct a human factors test.
Theoretically, the
Development Testing (DT) I time frame is very important.
But often a
contractor will have only components available for DT I testing, not the
whole system.
Therefore, practically speaking, it is DT II that is most
important for the DOD HFE specialist.
As we go through this lesson, you'll see that there are many factors
which intertwine with testing.
The Department of Defense is quite specific in its requirements for
system test and evaluation.
DOD Directive 5000.3 (test and evaluation)
indicates that it is essential that developmental and operational test and
evaluation be accomplished in order to ensure that the systems introduced
into service meet the defined operational requirements and are suitable for
service use. They must begin as early as possible and continue throughout
the system acquisition process in order to reduce acquisition risk and
increase military worth.
Although this directive indicates a need to begin as
early as
possible, can you think of any disadvantages to an early start?
What are
they?
(1) You can't really evaluate a 'system' until it is at the mock-cap or
similar stage. Turn to Page 62.
(2) It is not cost-effective to make changes early in the development cycle.
Turn to Page 84.
(3) It is difficult to gather valid data in early stages. Turn to Page 59.
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