ELIMINATION OF SUBSTANDARD PARTS BY ENVIRONMENTAL TESTING.
Abstract
Electromechanical hardware such as missiles, in general, exhibit three life phases; early failure, useful life, and wearout. The primary cause of early failures are substandard strength parts. These substandard parts, frequently referred to as 'bugs,' are parts whose strengths are much less than the average strength of a normal or standard part. Substandard parts usually result from manufacturing defects or human errors in construction. The useful life period of a device is the period after all defective parts have been replaced and prior to the beginning of standard part wearout. The highest reliability is observed during the useful life period. Laboratory environmental tests are useful as a debugging procedure and as a means of investigating the reliability of a device with all parts of standard design strength. A series of debugging and failure rate tests were performed at the U. S. Naval Missile Center and the failure data were presented by a unique method, providing graphical representations of reliability versus time. The data provided definite indications of early failure and useful life phases. (Author) (Presented at the 35th Symposium on Shock and Vibration and Associated Environments, Oct. 1965)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 20, 1966
- Accession Number
- AD0626842
Entities
People
- L. E. Matthews
- R. C. Binder