Lec7_v1 - Page 1/Lect 7 Process Design Process Quality...

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Page 1/Lect. 7 Process Design & Process Quality Control History (in brief): Specialized discipline (~1920, H. Ford) Societies for quality control (~1945, World War II) Wide applications in industries ~1970 o Motivations: Manufacturing of highly complex systems Needs for best quality and efficiency o Way of solution - development of proper mathematical tools Key methods and their founders: ~1875, F.W. Taylor Foundation of principles for enterprise scientific control ~1925, Sheward Statistical approach to production process description (on-line process monitoring) ~1930, Dodge & Roming Random sampling inspection methods ~1950, Deming Methods for improvement of production efficiency and production quality (focused on top-management) ~1980, Taguchi & Deming Overall dissemination and applications in industries (U.S.)
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Page 2/Lect. 7 Design Process and it’s Quality Traditional approach to design process as a feedback system with cycle operation: Major disadvantages of the previous (classical) approach: o Tends to drop into cycle operation, repeating the testing/design phases o Optimizes exclusively the design process output (!) (The product or process design is not optimal with respect to it’s economical conditions and properties - e.g. final product price) o Weak relations between the System Design and the Testing steps – occurrence of a so called “ over the wall problem solving (the system designer and the tester do not accept cooperation on joint problems, isolated approaches to problem solution what leads to multiple iterations of the previous cycle to achieve the required objectives of the design (quality, price, complexity, maintenance properties, reliability, etc.) o Strong influence of mentality of the manpower involved (depending on the cultural background, manpower and product market in the region, etc.) System Design Testing User Requirements (Inputs) Product or Process Design (outputs)
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Page 3/Lect. 7 Typical shape of the design/test iterations: Question: How to extinguish the negative phenomenon?
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