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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: Xiangping,Wu (7815@notesmail.huawei.com.cn )
Date posted: Sun Jul 11 23:40:44 US/Eastern 1999
Subject: Reliability of Telecommunication
Message:
I'm a reliability engineer of a telecommunication corp.of China,but I have little experience on reliability of telecommunication products.I would be very glad if someone can tell me something about how other telecommunication or electronics corp.s(e.g.,Motorola,IBM,Nokia,etc.) conduct reliability.Thank you,very much.


Reply:

Subject: Telesomminication Reliability
Reply Posted by: Joel Mandel (Mendel@teledata.co.il )
Organization: ADC Teledata
Date Posted: Mon Jul 12 2:09:22 US/Eastern 1999
Message:
Dear Mr Xiangping, I am in the process of writing a Reliability Program Plan for one of my products ( Telecommunication not military). I came into the site looking for some idea and came accross your question. I will outline my plan hoping for some feedback from you and others. I would start by purchasing the RAC Reliability Toolkit: Commercial Practices Edition . Then starting on the following tasks Reliability Requirements Definition Allocation RBD( Availability) Derating Stress Analysis Prediction(MTTR,MTBF) There is also a good article from the journal of RAC fourth quater 1977 I am also thinking about HALT testing of some sort What do you think? any other specific don't hesitate to write Joel Mandel ADC Teledata mendel@teledata.co.il


Reply:

Subject: Telecomunication Product Reliability
Reply Posted by: Bruce Dudley (bdudley@alionscience.com )
Organization: Reliability Analysis Center
Date Posted: Thu Jul 15 14:42:44 US/Eastern 1999
Message:
Most reputable manufactures include reliability features such as: Parts Control, Stress Derating, Quality Inspections and Controls, Design Reviews, Assessments of Performance, Critical Item Identification and TESTING/TESTING/TESTING. Some of the testing parameters that are considered essential for highly reliable products include: Drop Tests, Hot and Cold Temperature Tests, Electro Static Discharge Tests, Vibration Stress Tests, Tepmerature Cycling Tests, Temperature Shock Tests and HAST (Highly Accelerated Stress Tests). These tests are usually followed by tight electrical performance measurments and detailed failure analysis if problems are developed. At the Reliability Analysis Center, we have a series of "Blueprints for Product Reliability" that describe some of these reliability features and when to apply them.


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