Taguchi Method Essay

4561 words - 19 pages

IE 466: Concurrent Engineering

T. W. Simpson

32.3 Taguchi’ Robust Design Method s
Since 1960, Taguchi methods have been used for improving the quality of Japanese products with great success. During the 1980’ many companies finally realized that the old s, methods for ensuring quality were not competitive with the Japanese methods. The old methods for quality assurance relied heavily upon inspecting products as they rolled off the production line and rejecting those products that did not fall within a certain acceptance range. However, Taguchi was quick to point out that no amount of inspection can improve a product; quality must be designed into a product from the start. It is only ...view middle of the document...

Taguchi methods are used to specify dimension and feature detail and normally follow DFM activities. In the next section we discuss Taguchi’ concept of a s quality loss function. This is then followed by a detailed description of Taguchi’ approach to s parameter design.

32.3.1 Taguchi’ Quality Loss Function s
Consider the popular story of Sony and two of their television production facilities, one in the USA, the other in Japan. The color density of the televisions manufactured by Sony-USA were uniformly distributed and fell within the tolerance limits, m ± 5 ( where m is the target for color density), while the televisions from Sony-Japan followed a normal distribution, more televisions were on target but about 0.3% fell outside of the tolerance limits. The color density distributions are illustrated in Figure 1. The differences in customer perceptions of quality resulted from Sony-USA paying attention only to meeting the tolerances whereas in Sony-Japan, the focus was on meeting the target and minimizing the variance around that target. If we assign a grade to each television based on its color density as done in Figure 12, then we see that SonyJapan produced many more Grade A sets and fewer Grade C sets in comparison to Sony-USA. Overall, a much larger portion of Sony-Japan's televisions receive higher grades then those made by Sony-USA; hence, the customer’ preferred the televisions sets produced by Sony-Japan over s those produced by Sony-USA.

1

IE 466: Concurrent Engineering

T. W. Simpson

Figure 1 Color Density Distribution of Television Sets (Phadke, 1989) To measure quality, Taguchi defines a Quality Loss Function. The quality loss function is a continuous function that is defined in terms of the deviation of a design parameter from an ideal or target value, see Figure 2b. Taguchi’ view on the nature of the quality loss function s represents a fundamental paradigm shift (particularly in the U.S.) in the way in which manufacturers consider whether or not a product is good. The traditional approach employed by U.S. manufacturers (as evidenced by Sony-USA) has been to use a “step function” that ensures that performance fell within the upper and lower specification limits as shown in Figure 2a.

Figure 2 Quality Loss Function (Phadke, 1989) Taguchi’ loss function can be expressed in terms of the quadratic relationship: s L = k (y - m)2 [32.1] where y is the critical performance parameter value, L is the loss associated with a particular parameter y, m is the nominal value of the parameter specification, k is a constant that depends on the cost at the specification limits (can be determined conservatively by dividing the cost of scrap in $, by the square of the lower or higher tolerance values). This function penalizes the deviation of a parameter from the specification value that contributes to deteriorating the performance of the product, resulting in a loss to the customer. The key here is that a product engineer has a...

Other Essays Like Taguchi Method

Gnskjdgkjsn Essay

1978 words - 8 pages ) Measurement of quality is cost of nonconformance d) Observe zero defects day to improve quality 11. Quality chain reaction is the contribution of a) Deming b) Juran c) Crosby d) Garvin 12. PAF model of quality costs is the contribution of a) Deming b) Juran c) Crosby d) Garvin 13. Which of the following is the contribution of Taguchi a) Quality Loss Function b) 80/20 rule

Mr. Austin Essay

2611 words - 11 pages . - D. Dumitrescu, and N. Trandafir. "STATISTICAL QUALITY CONTROL METHODS OF PRODUCTS AND SERVICES." “The basic principle of the method is to identify errors, but to avoid them. PPS contributes to reducing costs because of scrap, further processing and verification costs. When using PPS, its positive influence on the process in terms of quality is noted. Using PPS allows savings by reducing tool change frequency, a diminishing of the number of

The Separation Of Capital Ownership And Control

1577 words - 7 pages The argument of whether the separation of capital ownership and control is an efficient form of organization has constantly been a controversial issue. The criticism whether the controllers’ act is in the best interest of the owners’ wills never end as long as hired managers operate management. As the number of public companies has been increasing over the course of this century, meanwhile the American style of contact based corporation has

The Versatility And Flexibility Of OLED's

1014 words - 5 pages In April 1, 2002, organic light emitting diodes gain rise in the scientific community with their published, more practical form at Ames Laboratory. “Scientists at the U.S. Department of Energy's Ames Laboratory, in collaboration with scientists at the University of Michigan, Ann Arbor, have developed and demonstrated a novel, fluorescence-based chemical sensor that is more compact, versatile and less expensive than existing technology of its

Comparing The Moral Virtues Of Antony And Julian The Apostate

1103 words - 5 pages Roman emperor Julian the Apostate and Christian leader Antony both exhibited many qualities of character during their existence. Both of them led very distinctive lives although shared several ethical values. Book 25 of “The Later Roman Empire” and the book “Early Christian Lives” show concrete evidence of this. In the following essay, I will argue how both leaders’ lives were devoted to their religious beliefs and their mutual cardinal virtues

Living In A Cashless Society

1637 words - 7 pages consider cashless society as a more advantageous, suitable, and adaptable means of payment, method of crimes prevention, and money laundering among crime conglomerates. This switch into the use of electronic cash or cashless society also brings the issues such as security, privacy, crime and computerization. One thing is certain and that is the fact that not all people would accept it (Arbeau, 2009). Like people will say “If you cannot beat them you

The French And Indian War: The "Real" First World War

1955 words - 8 pages The Seven Years War, or more commonly referred to as “The French and Indian War”, has been called the true First World War. In this book The French and Indian War: Deciding the Fate of North America, the author and historian Walter R. Borneman paints a detailed and elaborate picture that justifies the claim of it being the first true war of global proportions. If ever there truly was a climax to the never ending feud of the European powers

Is The Use Of Animals In Medical Research A Necessary Measure?

1513 words - 7 pages killing millions of innocent animal lives in the process. The use of animals for scientific experimentation purposes is unnecessary because countless animals are put through painful procedures in order to benefit humans lives when there are known alternative methods for achieving the same experimental results. Animal experimentation is not a modern day research method; Aristotle was one of the first to be recorded to use live animals in his

Education And The Evolving Job Market

2363 words - 10 pages across the country (Voltz et. al., 2010), and with good reason. Noddings (1983) states that in order to give all students an equal and quality education curriculum makers cannot force all of them to take the same path of study. Differentiated instruction is a “one size DOESN’T fit all” approach to teaching and learning that ensures all students have different paths throughout their schooling experience. This method of teaching is student-centered

Young And Relentless

1737 words - 7 pages There are numerous influences that can be responsible of teenager’s behaviors and attitude as they develop. One factor that is important to these behaviors is parental figures being over involved or uninvolved in their children’s lives. Many of these effects include illegal substance abuse, rising sexual activity, underage alcohol consumption, and tobacco use. Studies show parental participation plays a key role in the characteristics developed

The Natural Law Theory

1231 words - 5 pages Obeying by the natural law theory is the only true and moral way to live life; especially a life lived in God’s image. God’s presence is a guiding factor to obtaining a moral and virtuous life, which can only be obtained by following the natural law theory. God created a set of laws as a supreme guide for humans to live life, like any law these laws were created to ensure wellbeing for everyone. The laws he created are the civil law, the natural

Related Papers

Doe Taguchi Design Essay

1211 words - 5 pages generally used to demonstrate DOE as it has the simplest setup and meets the requirements for this method. Taguchi Design 1. Define the process objective i.e. whether we need the output to be maximum or nominal or smaller. In this experiment, it is given as nominal the best. 2. Determine the factors which affect the outcome and number of levels the factors can vary for performing the experiment. Here, the factors are Start angle, Stop

The Deming Approach Essay

1521 words - 7 pages systems. Juran noted that different levels of a company speak different languages, but the levels need to learn to communicate with each other in spite of their differences. Deming insisted that statistics needed to be a company's language, partly because of the differences between levels. Juran provided a detailed program for improving quality, outlining specific activities to be done within specific areas of a company. That method is

Quality Control Essay

3332 words - 14 pages Foster (2013) Benchmarking of business processes is usually done with top performing companies in other industry sectors (pp. 136-139). Organizationally, we mirror the Taguchi Method which defines ideal quality, quality loss function, and his philosophy of a Robust Design (Foster, 2013, p.357). The Taguchi method of Robust Design is described by Foster (2013), as designing products that are essentially defect free, and are insensitive to

Toyota Make Or Brake Essay

3361 words - 14 pages the specification in manufacturing sector is believed to be 40 percent of operating cost (Krezner,2001). 4. Dr. Taguchi, a notable quality researcher who carried out his research in Japan and developed quality concepts build on W.E Deming’s view of 85 percent of less quality product is due to lake of manufacturing processes and and the responsibility rests with the management to fix these problems. Taguchi’s method is based on