To calculate the failure rate and MTBF of a resistor using the MIL-HDBK-217F failure model, thermistor or variable resistor, enter its parameters in the following table.
Notes
(1) Established reliability styles are failure rate graded (S, R, P, M) based on life testing defined in the applicable military device specification. This category applies only to three-letter styles with an "R" suffix, such as RCR or RLR. Also see the quality table.
(2) Resistor Case Temperature. Can be approximated as ambient component temperature for low power dissipation non-power type resistors.
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Quality isn't something that can be argued into an article or promised into it. It must be put there. If it isn't put there, the finest sales talk in the world won't act as a substitute.
Practical Acceptance Sampling (2nd Edition) is a hands-on introduction to the inspection of products and services for quality assurance using statistically-based sampling plans.
The upper limit on the number of non-conforming items in a sample, that would still lead to the acceptance of the entire lot. If the number of non-conforming items in the sample exceeds this number, the entire batch must not be accepted.