NASA/TP-2003-212242, NASA TECHNICAL PUBLICATION: EEE-INST-002: INSTRUCTIONS FOR EEE PARTS SELECTION, SCREENING, QUALIFICATION, AND DERATING (MAY 2003)

NASA/TP-2003-212242, NASA TECHNICAL PUBLICATION: EEE-INST-002: INSTRUCTIONS FOR EEE PARTS SELECTION, SCREENING, QUALIFICATION, AND DERATING (MAY 2003)., Due to the dynamic nature of this document, users are advised to check the http://nepp.nasa.gov website prior to every usage to obtain the latest document revision. The purpose of this document is to establish baseline criteria for selection, screening, qualification, and derating of EEE parts for use on NASA GSFC space flight projects. This document shall provide a mechanism to assure that appropriate parts are used in the fabrication of space hardware that will meet mission reliabiity objectives within budget constraints. This document provides instructions for meeting three reliability levels of EEE parts requirements (see 6.0) based on mission needs. The terms “grade” and “level” are considered synonymous; i.e., a grade 1 part is consistent with reliability level 1. Levels of part reliability confidence decrease by reliability level, with level 1 being the highest reliability and level 3 the lowest. A reliability level 1 part has the highest level of manufacturing control and testing per military or DSCC specifications. Level 2 parts have reduced manufacturing control and testing. Level 3 Parts have no guaranteed reliability controls in the manufacturing process and no standardized testing requirements. The reliability of level 3 parts can vary significantly with each manufacturer, part type and LDC due to unreported and frequent changes in design, construction and materials. GSFC projects and contractors shall incorporate this guideline into their Project EEE Parts Program.