Download excellent quality study note and ebooks of amie section a in pdf,ppt,doc format
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Achieving a quality design places great emphasis on understanding the needs and wants of the customer, but there is much more to it than that. In the 1980s there was the realization that the only way to ensure quality products is to design quality into the product , as opposed to the then-current thinking that quality products were produced by careful inspection of the output of the manufacturing process. Other contributions to design from the quality movement are the simple total quality management tools, that can be quickly learned and used to simplify team understanding of various issues in the design process, and QFD, for aligning the needs of the customer with the design variables. Another important tie between quality and design is the use of statistics to set the limits on tolerances in design and the relationship to the capability of a manufacturing process to achieve a specified quality (defect) level.
A robust design is one whose performance is insensitive to variations in the manufacturing processes by which it has been made or in the environment in which it operates. It is a basic tenet of quality that variations of all kinds are the enemy of quality, and a guiding principle to achieving quality is to reduce variation. The methods used to achieve robustness are termed robust design . These are basically the work of a Japanese engineer, Genichi Taguchi, and his co-workers, and have been adopted by manufacturing companies worldwide. They employ a set of statistically designed experiments by which alternative designs are generated and analyzed for their sensitivity to variation. The parametric design step is the place where design for robustness methods is applied to critical-to-quality parameters.
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