RELIABILITY ENGINEERING


Reliability, Availability, Maintainability

Frequentis systems can be used as a synonym for reliability
Responsibilities for reliability, availability and maintainability are placed in the Total Quality and Safety Management department. The advantage to have the competency for different but related engineering disciplines in one department is obvious.

Frequentis puts big efforts on the optimisation of all reliability measures as a major goal in all developments. According to the most common, applicable and knowledgeable standards a Reliabiity Programme has been set-up in co-operation with the developing departments to assure consideration of reliability issues from the earliest stages of a system development on.

The Total Quality and Safety Management department analyses each system and points out potential weaknesses in the system design or components. Remedial action is taken immediately in order to reach an availability value of well over 99.9995 %, which can be seen as Frequentis standard.

For the calculation of reliability measures Reliability Block Modeling was chosen. The Mean Time Between Failures (MTBF) for each Line Replaceable Unit (LRU) is calculated according to MIL-HDBK 217F, following the parts count method by using the quality factors of ground benign environment.

Applicable Standards:
  • MIL-HDBK 217F: Reliability Prediction of Electronic Equipment
  • MIL-STD 785B: Reliability Program for Systems and Equipment
  • MIL-STD 756B: Reliability Modeling and Prediction
  • Def Stan 00-40: Reliability and Maintainability
  • Def Stan 00-41: Reliability and Maintainability, MOD Guide to Practices and Procedures
  • MIL-STD-1629A: Procedures for Performing a Failure Mode, Effects and Criticality Analysis
Maintenance
Customer Training
System Safety
Documentation
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