Importance of Quality in different manufacturing processes| |
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1. Defination of Quality
2. Activities of Quality
3. Quality Control
4. Quality Improvment
5. Steps of Quality Improved in Manufacturing Process
6. Taguchi’s Approach to quality Engineering
7. Robust Design
8. Adverse Performance Shaping Factors
DEFINITION OF QUALITY
How is quality defined? It is interesting to observe how its definition varies according to the particular emphasis of quality activities. Juran (1964) defines quality as fitness for use. Crosby (1979) describes quality in terms of conformance to requirements. Deming (1986) says that quality is concerned with the present and future needs of the customer. For Feigenbaum (1983) quality is to do with the combined product characteristics of engineering and manufacture that determine the degree to which the product will meet the expectations of the customer. Taguchi (1986) defines quality as the loss a product causes society once it has been shipped, apart from any losses caused by its intrinsic functions. According to ISO 8402 (International Organization for Standardization,1986), quality is the totality of features and characteristics of a product or service that have a bearing on its ability to satisfy stated or implied needs. Recently, the most widely used definition is that of ISO 9001 (2000). It says that a quality is a characteristic that a product or service must have. For example, products much be reliable, useable, and repairable. These are some of the characteristics that a good quality product must have. Similarly, service should becourteous, efficient, and effective. These are some of the characteristics that a good quality service must have. In short, a quality is a desirable characteristic. However, not all qualities are equal. Some are more important than others. The most important qualities are the ones that customers want. These are the qualities that products and services must have. So providing quality products and services is all about meeting customer requirements.
ACTIVITIES OF QUALITY
In the manufacturing industry, activities concerned with quality can be divided into six stages: 1. Product planning: planning for the function, price, life cycle, etc. of the product concerned. 2. Product design: designing the product to have the functions decided in product planning. 3. Process design: designing the manufacturing process to have the functions decided in the product design. 4. Production: the process of actually making the product so that it is of the designed quality. 5. Sales: activities to sell the manufactured product.
6. After-sales service: customer service activities such as maintenance and product services.
* Note that there are three different characteristics of quality in an overall quality system in the manufacturing industry: 1.Quality of design: quality of product planning, product designand process design....