Concurrent tolerancing for design and manufacturing based on the present worth of quality loss

2011 ◽  
Vol 59 (9-12) ◽  
pp. 929-937 ◽  
Author(s):  
Heping Peng
Keyword(s):  
Quality Loss ◽  
Design And Manufacturing ◽  
Present Worth

Modeling Present Worth of Product Quality Loss of STB Characteristic Based on Service Life Distribution

2013 ◽  
Vol 397-400 ◽  
pp. 846-851 ◽  
Author(s):  
Yan Ming Zhao ◽  
De Shun Liu ◽  
Ze Jun Wen ◽  
Ting Liu
Keyword(s):  
Service Life ◽  
Product Quality ◽  
Cylindrical Surface ◽  
Quality Characteristics ◽  
Quality Characteristic ◽  
Quality Loss ◽  
Life Distribution ◽  
New Model ◽  
Product Service ◽  
Present Worth

The product smaller-the-better (STB) quality characteristics are continually changing and out of specification limits because of the constant stress, wear and others after the product is put into use, which will cause loss because of the product rejected and scrapped. On the basis of the quality viewpoint that product quality loss is present worth of a loss caused as a result of its quality characteristics because its quality characteristic is out of specification and lead to product scrap after the product is put into service, the paper establishes the present worth model of quality loss of STB characteristic based on service life distribution, and proposes the calculation method on the probability density function (PDF) of the product service life based on the technical specifications of STB quality characteristic. It takes the concentricity between the inner cylindrical surface and the outer cylindrical surface of the link bushing as an example to analysis the various factors that impact on the present worth of concentricity quality loss in the new model, and contrast with Taguchi quality loss model. The results show that the new model describes an actual loss that a product imparts to society after the product is put into service, and can reflect the quality loss of STB characteristic in the product service process, and is more realistic than Taguchi quality loss model of STB. The new model extends tolerance design of STB characteristic from the manufacturing stage to the service stage.

Robust Tolerance Design Considering Process Capability and Quality Loss

1999 ◽  
Author(s):  
Chang-Xue (Jack) Feng ◽  
Ravi Balusu
Keyword(s):  
Manufacturing Process ◽  
Lead Time ◽  
Process Capability ◽  
Concurrent Design ◽  
Manufacturing Cost ◽  
Tolerance Design ◽  
Quality Loss ◽  
Quality Loss Function ◽  
Capability Indices ◽  
Design And Manufacturing

Abstract Tolerance design bridges design and manufacturing. Concurrent design of tolerances and manufacturing processes may ensure the manufacturability, reduce the manufacturing and other related costs, decrease the number of fraction nonconforming (or defective rate), and shorten the production lead time. Since process capability indices relate tolerance specifications to manufacturing process capabilities, it is quite natural to apply them to concurrent design of tolerances and processes. As process shifts often exist in a manufacturing process, using Cp does not yield a good estimation of fraction nonconforming. Index Cpk does not precisely measure process shift either, but Cpm does. Therefore, this research compares the applications of Cp, Cpk and Cpm based on a numerical example of non-linear mechanical tolerance synthesis. In addition, the Taguchi quality loss function is used together with the manufacturing cost as the objective function.

A study on the present worth of bivariate quality loss

2000 ◽  
Vol 23 (2) ◽  
pp. 251-258 ◽  
Author(s):  
Chao‐Yu Chou ◽  
Wen‐Hsiung Liang ◽  
Chun‐Lang Chang
Keyword(s):  
Quality Loss ◽  
Present Worth

On the present worth of multivariate quality loss

2001 ◽  
Vol 70 (3) ◽  
pp. 279-288 ◽  
Author(s):  
Chao-Yu Chou ◽  
Chung-Ho Chen
Keyword(s):  
Quality Loss ◽  
Present Worth

Conception And Fabrication Of Straight Axes Using Knowledge Management Principles

2014 ◽  
Vol 1 (1) ◽  
pp. 365-368
Author(s):  
Ionela Magdalena Rotaru ◽  
Sorin Borza
Keyword(s):  
Knowledge Management ◽  
Work Environment ◽  
Automotive Industry ◽  
Central Element ◽  
Theoretical Concepts ◽  
Application Field ◽  
Design And Manufacturing ◽  
Original Product ◽  
Practical Level

Abstractthe paper continues the research started in the paper “Conception and fabrication using knowledge management principles”. The theoretical guidelines found in the mentioned paper crystallises at a practical level in an original product – a software solution. The proposed solution has as a central element notion concerning the design and manufacturing of straight axes in the automotive industry. The application field for the proposed example regards the educational area; the software guides the user by theoretical concepts, examples, problems through practical aspects concerning the design and manufacturing of a part belonging to the axes family specific to the automotive industry. The software was developed using the Access work environment.

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