MIL-STD-790G
* 5.2.6 Clean rooms. When the military product specification includes the requirements of a clean room, airborne particulate class limits shall be defined. The proper class shall be specified by the manufacturer's design activity in the process specification (ISO 14644-1 and ISO 14644-2 may be used as a guideline). The manufacturer shall establish action and absolute control limits (at which point work stops until corrective action is completed) based on historical data and criticality of the process in each particular area.
5.2.7 Description of production processes and controls. The manufacturer shall maintain a system that details the production processes, steps, and controls applied to parts currently produced and proposed
for inclusion in this program. Requirements and tolerances shall be specified for all critical environments and utilities which come in contact with the production and test of electrical, electronic, and fiber optic parts. When applicable, the system shall include such items as:
a. List of process control equipment and periodic calibrations. b. Control of chemical purity and ionization of water.
c. Known composition of all gases and chemicals, including degree and type of contamination, used in the processes and control of fabrication.
d. Definition of maximum permissible variations in voltage used in the processes or supplied to the test equipment which may introduce errors or variations in the performance or inaccuracies in test data.
e. Definition of clean rooms or other controlled atmospheric requirements. f. Process specifications showing process tolerances.
g. Detailed engineering specification requirements covering types of parts.
h. Identification of each inspection operation for receiving inspection, inspection during manufacture, inspection of completed parts including related sampling plans, and inspection tolerances.
i. Procedures for forming conformance inspection lots which will comply with part specification criteria.
j. Procedure for identification of each production lot through all significant manufacturing operations, including final assembly operations such as casing, hermetic sealing, or lead attachment. Alternately, where this procedure is impractical (e.g., where a part cannot be identified until after final assembly and determination of its performance characteristics), the manufacturer shall as a minimum be able to identify the time period during which the final production operation was performed on each item of product prior to final test. The date or lot code marked on each part shall be identified to a production lot.
k. The manufacturer listed must notify the qualifying activity of any major change affecting the design or process of the qualified product.
5.2.8 Acquisition and production control system. The manufacturer shall maintain an acquisition and production control system that identifies pertinent internal documents relating to acquisition and processing of materials, production of parts and methods of product assurance (e.g., name, number, release date, and latest revision).
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