Musings on reliability and maintenance topics

Short essays and thoughts (musings) on reliability and maintenance engineering topics. Let me know your reaction and thought, plus any questions.
ISSN 2329-0080

Specify Reliability Goals and Expect an Argument

April 23, 2015
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Supplier Reliability Case Selecting as supplier for components or subsystems involved many aspects including the desired reliability performance. Once selected the ability of the supplier to provide items that meet or exceed the reliability requirements relies on their understanding of the requirements and operational conditions related to the specific item within the system. It also […]

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How to judge an FMEA study

April 16, 2015
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Thoughts on Judging an FMEA Study It is rare that a third party generated FMEA/FMECA has any value. The development or manufacturing teams and supporting staff should comprise the bulk of the study’s team. Team size for a specific study would include 4 to 10 individuals. The FMEA/FMECA should provide clear action items that may […]

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Uncovering Hidden Field Failure Problems

April 4, 2015
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How to Prevent Customers from Finding Reliability Issues A reliable product does not fail often. Customers expect to a level of reliability performance and failures that occurs too early dash their expectation. The design and development team work to create a robust product. To meet the customer’s reliability expectations. The team may use a range […]

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Reliability Planning to Create a Reliability Product

March 31, 2015
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Reliability Planning A specific reliability plan may include any number of specific tasks. To build an effective plan you need the knowledge of the individual tools and techniques, plus how they may fit together to create an overall plan to achieve your goals. Reliability Goals Of course this start with establishing complete reliability goals that […]

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Purpose of a Reliability Program

March 22, 2015
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Purpose of a Reliability Program The reliable performance of a system is important. It is important to the customer, to our business and to us. Very few argue that we should ignore the reliability characteristics of a product. We also deem cost, time to market or feature set as important also. The trouble is we […]

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Duration and Reliability Goals

March 15, 2015
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Duration Coupled with probability is the duration over which the probability applies. For example, if we desire 99 of 100 to survive, we must state over which period of time this applies. It is proper to state the couple of 99% reliable over 1 year. It is not sufficient to define reliability as ‘5 year […]

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Probability and Reliability Goals

March 8, 2015
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Probability Roll the dice. It is about that simple if any one product will survive to a specific time. Every product has a chance not a guarantee. The time to failure for each product is a function of the use, stresses, assembly, latent defects or imperfections, and many other variables. The result is generally unknown.

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Environment Element of Reliability Goal

March 1, 2015
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Environment This element of a reliability requirement answers the questions of where and under what conditions the product should operate. It includes storage, transportation, and installation conditions too. One way to think of the environment is to consider the weather around the device. Temperature, humidity, preoccupation, etc.

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Use Profile and the Reliability Definition

February 23, 2015
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Use Profile How a customer uses a product matters. It matters in the amount and type of stress your product receives. It determines the life span. Someone that uses the product often isn’t necessarily going to have a short life span, it might be the lack of use that most damages a product.

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Function: A Reliability View

February 16, 2015
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Defining the product’s function well, allows us to define failures well, too.

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