7.7.7 Verification of Human
For human-machine systems, the purposes of verification testing
can be described as follows .
Demonstrate the conformance of the product to human
engineering design criteria
||Confirm compliance with specific
||Secure quantitative measures of
human-machine performance characteristics that are functions of
||Determine whether or not undesirable
characteristics have been
The demonstration of human performance reliability (in
maintenance situations) may overlap with maintainability demonstrations or
testing. The same set of tasks may be considered but with different criteria.
For example, in a maintainability demonstration, the principle concern is the
time required to complete a task. If the same task is employed in a human
performance reliability context, the important criteria are not only correct
completion of the task but also completion of the task within a time
constraint. The references provide additional details on structuring tests to
estimate maintenance technician reliability.
For estimates of reliability in an operator type situation, data
must be accumulated either by use of a simulator or by an expanded reliability
demonstration that includes the operator as well as the equipment. In either
case, the data will resemble actual field results only to the extent that the
test scenario and the performance of the test subjects resemble the actual