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MIL-A-81359(AS)
independence of one source of another is determined by the extent to which the one source
is independent of the other for manufacture: and by the lack of common original suppliers of
raw or processed materiaIs. Design, process information, technology, and diffusion masks
may be derived from a common source. However, in such a case, each device source shall
have a demonstrated capability of originating these items. The corporate (or firm) and
financial independence of one source of another is determined by the absence of common
directors, common officers, or holders of large common financial interests. Geographical
separation is simply the distance between the locations where principal manufacture takes
place by two sources.
6.13
Microelectronic Interchangeability Demonstration - Interchangeability of
microelectronic elements shall be demonstrated as follows:
(1)
For the interchangeability at the MIC level, it shall be demonstrated
for each type of functional MIC from one source, as used in the sys-
tem, that it is mechanically and electrically interchangeable with that
from another source (see 6.12).
(2)
For the interchangeability y at the Maintenance module level, it shall
be demonstrated that modules typical of those to be used in the sys-
tem composed of MICS from one source are mechanically and elec-
trically interchangeable with modules composed of MICS from another
source.
(3)
For the completed equipment, it shall be demonstrated that modules
composed of MICS from one source are interchangeable with corre-
sponding modules composed of MICS from another source. When
interchange has been effected, no degradation shall take place in
system and subsystem performance.
21

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