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Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum (src_forum@alionscience.com )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

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Original Message:

Posted by: Wayne
Date posted: Wed Sep 4 9:13:29 US/Eastern 2002
Subject: Reliability Demo
Message:
I would like to ask if we can incoporate RDGT results into Reliability Demonstraion? from my opinion i dont think so because RDGT does not tell us the demonstrated MTBF instead it tells us the instantaneous MTBF. In this case, we cannot make use of the RDGT data and continue frm there to carry out Reliability Demo right? ALthough the production unit and the prototype configuration is almost the same. Care to enlighten on this issue? Actually what is the difference between the demonstrated MTBF based on AMSAA model and demonstrated reliability based on Mil-STD 781 on Reliability Demonstration. Are they refering to the true MTBF of the system under test?


Reply:

Subject: Growth Testing
Reply Posted by: Bruce Dudley (bdudley@alionscience.com )
Organization: RAC
Date Posted: Wed Sep 4 10:55:22 US/Eastern 2002
Message:
An RQT is used to measure the reliability of a fixed design configuration. It has the benefit of holding the manufacturer accountable some day down the road from his initial design process. An RGT is used to improve the design reliability. It recognizes that the drawing board design of a complex product cannot be perfect from a reliability point of view and allocates the necessary time to fine tune the design by finding problems and designing them out. The forms of testing serve very different purposes and complement each other in development of systems. An RGT is not a substitute for an RQT or any other reliability design task. With all these questions that are being posed on growth testing and maintainability, I would suggest that you procure the RAC Reliability Toolkit and the Maintainability Toolkit as these handbooks have a lot of basic test information. The RAC also offers training courses on growth testing and reliability design.


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