What is MIL HDBK 217F?

MIL-HDBK-217F, MILITARY HANDBOOK: RELIABILITY PREDICTION OF ELECTRONIC EQUIPMENT (02-DEC-1991)., The purpose of this handbook is to establish and maintain consistent and uniform methods for estimating the inherent reliability (i.e., the reliability of a mature design) of military electronic equipment and systems.

What is MIL 217?

The MIL-217 standard is a reliability prediction program based on the internationally recognized method of calculating electronic equipment reliability given in MIL-HDBK-217 (published by the US Department of Defense).

What established reliability?

(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.

What does ground benign mean?

Ground Benign (GB) Nonmobile, temperature and humidity controlled environments readily accessible to maintenance; includes laboratory instruments and test equipment, medical electronic equipment, business and scientific computer complexes, and missiles and support equipment in ground silos. 50. 30.

What’s an example of benign?

Common examples of benign tumors are fibroids in the uterus and lipomas in the skin. Specific types of benign tumors can turn into malignant tumors. These are monitored closely and may require surgical removal.

What does Benin mean in medical terms?

Benign refers to a condition, tumor, or growth that is not cancerous. This means that it does not spread to other parts of the body. It does not invade nearby tissue. Sometimes, a condition is called benign to suggest it is not dangerous or serious.

What is the latest version of MIL-STD-461?

The latest revision (as of 2015) is known as “MIL-STD-461G”. While MIL-STD-461 compliance is technically not required outside the US military, many civilian organizations also use this document.In 1999, MIL-STD-462 was combined with MIL-STD-461D into MIL-STD-461E.

What is the difference between the validity and reliability?

Reliability and validity are both about how well a method measures something: Reliability refers to the consistency of a measure (whether the results can be reproduced under the same conditions). Validity refers to the accuracy of a measure (whether the results really do represent what they are supposed to measure).

What is part count reliability prediction in mil-i-idbk-217f?

MIL-I-IDBK-217F APPENDIX A: PARTS COUNT RELIABILITY PREDICTION Parts Count Reliablllty Predlctlon – This predictionmethod is applicableduring bid proposal and early design phases when insufficient information is available to use the part stress analysis models shown in the main body of this Handbook.

What is the Handbook of reliability prediction procedures for mechanical equipment?

“Handbook of Reliability Prediction Procedures for Mechanical Equipment,” NSWC-94/L07. This Handbook includes a methodology for nineteen basic mechanical components for evaluating a design for R&M that considers the material properties, operating environment and critical failure modes.

What are established reliability styles for military devices?

NOTE: Established reliability styles are failure rate graded (S, R, P, M) based on life testing defined in the applicable military device specification. This category usually applies only to three-letter styles wilh an “R”suffix. Environment Factor -n= Environment GB GF GM Ns Nu AC ‘IF ‘Uc ‘UF ‘RW SF MF ML CL 1,0 4.0 16 12 42 18 23 31 43 63 .50 37

What does the mil-217 standard mean?

By component stresses, the standard is referring to the actual operating conditions such as environment, temperature, voltage, current and power levels applied, for example. The MIL-217 standard groups components or parts by major categories and then has subgroups within the categories.