MIL-HDBK-115B(ARMY) APPENDIX C
requirements and performance, reliability, maintainability, environmental, and other functional requirements, to ensure identification and adequate reprocurement of an interchangeable item. If an electrical or electronics (or other engineering) circuit is involved, a schematic and connection or other appropriate diagrammatic disclosure is included or referenced on the drawing to provide sufficient information for making external connections.
c. In dealing with specification control drawings, you should be aware of the following:
1. The suggested sources listed on a specification control drawing are not intended to represent the only sources for the item;
2. Qualification testing of commercially or vendor developed items in advance of a procurement action is not a prerequisite for inclusion on a specification control drawing. If such testing or approval is essential, the item is normally a candidate for Source Control Drawing coverages;
3. Vendor developed items are those products of industries which normally provide customer application engineering services for a commercial product line; their products are commercially available from a specialized segment of an industry. Typical examples are special motors, synchros, transformers, potentiometers, hydraulic valves, carburetors, potted servo-amplifiers, keyboards, tape readers;
4. Altered items, selected items, and items depicted in Federal, military, and recognized industry association standards or specifications, are not delineated on Specification Control Drawings;
5. Specification control drawings are not used to depict commercially developed or vendor developed items upon which a design activity has placed requirements in addition to those normally provided by vendors. These kinds of items are depicted on either Selected Item Drawings or Altered Item Drawings, as appropriate;
6. This standard, by itself, should not cause preparation of specification control drawings for all applicable vendor items. Preparation criteria for engineering drawings are governed by the contract or order; and
7. Specification control drawings may be used for competitive acquisition. A specification control number is a control number and should not be used as a part identification number.
C.4.3.2 Source control drawings. Source control drawings depict an existing commercial or vendor item which exclusively provides the performance, installation, and interchangeable characteristics required for one or more specific critical applications.
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