MIL-HDBK-115B(ARMY) APPENDIX C
ENGINEERING DRAWINGS
(Levels/Type/Content)
C.1 SCOPE
C.1.1 Scope. The types and number of drawings required to satisfy the function should be prepared based on sound engineering judgment concerning the complexity and engineering sophistication of the design (see 5.25.4).
C.2 LEVELS
C.2.1 Engineering drawing levels. Engineering drawings and associated data should be acquired at one or more of three levels -- Level 1, Conceptual and Development Design Data; Level 2, Production Prototype and Limited Production Data; and Level 3, Production Data.
C.2.1.1 Level 1 drawings. Level 1 engineering drawings and associated data will disclose, as a minimum, engineering design information sufficient to evaluate an engineering concept. They may also provide information sufficient to fabricate developmental hardware. Layout drawings and combinations of types of engineering drawings may be used to convey engineering concepts so that the information is understandable to cognizant Government engineers and scientists. This information should also enable fabrication by the design contractor of developmental hardware for test or experimentation.
C.2.1.2 Level 2 drawings. Level 2 engineering drawings and associated data should disclose a design approach suitable to support the manufacture of a production prototype and limited production models. Engineering drawings should include, as applicable, parts list, detail and assembly drawings, interface control data, diagrams, performance characteristics, critical manufacturing limits, and details of new materials and processes. Special inspection and test requirements necessary to determine compliance with requirements for the item should be defined on the engineering drawings or referenced to a document acceptable to the Government.
C.2.1.3 Level 3 drawings. Level 3 engineering drawings and associated data should provide engineering definition sufficiently complete to enable a competent manufacturer to produce and maintain quality control of item(s) to the degree that physical and
performance characteristics are interchangeable with those of the original design. These characteristics should be obtained without resorting to additional product design effort or design data, and without recourse to the original design activity. Level 3 engineering drawings should:
a. Reflect the end-product;
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