tailieunhanh - Reliability in Automotive and Mechanical Engineering Bernd Bertsche

Tham khảo sách 'reliability in automotive and mechanical engineering bernd bertsche', kỹ thuật - công nghệ, năng lượng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Bernd Bertsche Reliability in Automotive and Mechanical Engineering VDJs Springer 1 Introduction It is impossible to avoid all faults Of cause it remains our task to avoid faults ifpossible Sir Karl R. Popper Today the term reliability is part of our everyday language especially when speaking about the functionality of a product. A very reliable product is a product that fulfils its function at all times and under all operating conditions. The technical definition for reliability differs only slightly by expanding this common definition by probability reliability is the probability that a product does not fail under given functional und environmental conditions during a defined period of time VDI guidelines 4001 . The term probability takes into consideration that various failure events can be caused by coincidental stochastic distributed causes and that the probability can only be described quantitatively. Thus reliability includes the failure behaviour of a product and is therefore an important criterion for product evaluation. Due to this evaluating the reliability of a product goes beyond the pure evaluation of a product s functional attributes. According to customers interviewed on the significance of product attributes reliability ranks in first place as the most significant attribute see Figure . Only costs are sometimes considered to play a more important role. Reliability however remains in first or second place. Because reliability is such an important topic for new products however it does not maintain the highest priority in current development. Figure . Car purchase criteria DAT-Report 2007 B. Bertsche Reliability in Automotive and Mechanical Engineering. VDI-Buch doi 978-3-540-34282-3_1 Springer-Verlag Berlin Heidelberg 2008 2 1 Introduction Surveys show that customers desire reliable products. How does product development reflect this desire in reality Understandably companies protect themselves with statements concerning their product