MIL-STD-883J
METHOD 5001
20 November 1969
1
METHOD 5001
PARAMETER MEAN VALUE CONTROL
1. PURPOSE. The purpose of this method is to define a technique for assuring a conformance to a maximum or
minimum mean of a parameter measured in any test method listed in section 3000 and 4000 of this standard. This method
is not intended for general application to acquisitions where it is important only to assure that device parameters are
between specified limits. It is intended for use only where it is necessary to control the average or mean value for a given
parameter throughout a lot of shipment of devices. When this method is employed, it is expected that the specified group of
devices tested will be packaged for shipment as a group together with the required data. It is also expected that some
provisions will be required for special marking of devices subjected to this method to identify that they have met the selection
criteria involved and that they are therefore not directly interchangeable with identical devices which have not been
controlled or selected in this manner.
2. APPARATUS. For distribution control, it is desirable for the measuring equipment to have data logging capability in
addition to the capabilities listed in section 3000 and 4000. The data shall be recorded and analyzed to compute the
average value of a group of microelectronic devices. The size of the group shall be specified in the applicable acquisition
document.
3. PROCEDURE. Microelectronic devices shall be separated into groups. Each group will be tested in accordance with
the specified test method. The reading from each device will be recorded. When all devices in the group have been tested,
the recorded data shall be averaged (or the mean value computed) and compared against a maximum or minimum limit
specified in the applicable acquisition document.
4. SUMMARY. The following details must be specified in the applicable acquisition document:
a. Absolute maximum and minimum limits.
b. Maximum or minimum limits on the average or mean.
c. Group size.
d. Requirements for data logging, special marking, and special provisions for group packaging and shipment, where
applicable.
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