The objectives of power supply standardization include the following:
(1) Partition supplies in a manner which allows for commonality among a
majority of equipment applications.
(2) Provide a rigorous quality program to ensure interchangeability and
(3) Establish basic requirements compatible with the majority of military
electronic system applications and environments.
(4) Reduce recurring development costs and ease the logistics support burden
by extensive intersystem commonality of a limited number of power
(5) Provide established mechanical packaging having flexibility for
(6) Develop functional specifications to preclude a dependence on a specific
design or technology.
Too often, power supplies are designed for a system when they should be
designed into the system. This results in pressure to cut corners in the design
to meet other program commitments and a proliferation of hardware. In addition,
nonrecurring and documentation costs are added, schedule and performance risks
are increased and logistics problems are further amplified.
For example, during a study at a prime contractor's facility, it was
determined that over a three-year period, 161 individual power supplies had been
specified. A conservative estimate that only 40% of the 161 supplies required
nonrecurring development (typically 6,600 hours) yields a total expenditure of
425,000 man- hours for development. Eight standard power supplies could have met
the requirements at a development resource burden of approximately 53,000
man-hours and could have been much less if the standard supplies already
existed. This comparison does not consider additional unique repair facility
costs and spare requirements/logistics, nor does it address the development
problems and failures.
A power supply standardization program can provide benefits in each of the
program phases of an electronic system. These benefits are summarized in the