By Dev G. Raheja, Louis J. Gullo
A designated, design-based method of reliability engineering
Design for Reliability presents engineers and executives with a number of instruments and strategies for incorporating reliability into the layout strategy for complicated platforms. It in actual fact explains how you can layout for 0 failure of severe process capabilities, resulting in huge, immense discount rates in product life-cycle bills and a dramatic development within the skill to compete in worldwide markets.
Readers will discover a wealth of layout practices no longer coated in ordinary engineering books, permitting them to imagine outdoors the field whilst constructing reliability necessities. they're going to learn how to handle excessive failure charges linked to platforms that aren't correctly designed for reliability, warding off dear and time-consuming engineering alterations, similar to over the top checking out, upkeep, upkeep, inspection, and logistics.
Special positive factors of this e-book include:
- A unified process that integrates principles from laptop technological know-how and reliability engineering
- Techniques appropriate to reliability in addition to security, maintainability, approach integration, and logistic engineering
- Chapters on layout for severe environments, constructing trustworthy software program, layout for trustworthiness, and HALT impression on design
Design for Reliability is a must have consultant for engineers and executives in R&D, product improvement, reliability engineering, product safeguard, and caliber insurance, in addition to someone who must bring excessive product functionality at a cheaper price whereas minimizing process failure
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Extra resources for Design for Reliability
Example 1 A company in Brazil had designed a large warning light bulb on a control console, with a plastic cover to reduce glare. They told me that they tried all kinds of plastics for the cap but that all of them melted after a few months. Someone suggested using a glass cover. We received the usual stupid answer: “Glass will cost three times as much as plastic. ” The bad part is that many engineers look only at the cost of the component and completely ignore the cost of losing customers and the warranty costs to the employer.
As with any of such predictive models, it is wise to validate the models with actual stress tests. This type of analysis requires comparatively high resources, and in most programs is presently used for particularly critical applications, as cited above. The prediction results are not just numerical values, such as mean time between failures (MTBF), failure rate, or probability of success. For them to be meaningful, their calculation methodology and underlying assumptions must be communicated as well.
Both can be used to help drive improvement action. An Ishikawa ﬁshbone chart (Figure 8) is almost the same as a fault tree but has a different format. It can be designed to help assure that the user considers all the important processes involved. Some typical areas considered in either a fault tree or ﬁshbone diagram to ﬁnd root causes are: • • • • • Assembly [documentation, tool calibration, error-prooﬁng, and electrostatic discharge (ESD) prevention] Human error (task loading, training, and distractions) Design (materials, application, environmental stresses, and engineering review processes) Handling (point-to-point movement, inspection handling, and protection) Test (test equipment, calibration, and ESD prevention) Test Data Analysis 31 TEST DATA ANALYSIS Life Testing and Acceleration Factor Speciﬁc failure modes are often tied to a component life.
Design for Reliability by Dev G. Raheja, Louis J. Gullo