quality control
Quick Summary
Quality control is the use of statistical methods to ensure the quality of products and services. It involves activities like design analysis and inspection to prevent defects, particularly in manufactured goods.1234
Two primary methods are used:
* Acceptance Sampling: This involves inspecting a sample from a batch (lot) of items. If the sample meets quality standards, the entire lot is accepted; otherwise, it's rejected. This method considers the risks to both the producer and the consumer.23
* Statistical Process Control (SPC): SPC uses statistical methods and graphical tools called control charts to monitor ongoing processes. These charts help identify whether variations in output are due to random causes or specific, correctable issues. If problems are found, the process can be adjusted to maintain desired quality levels.12
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- clothing and footwear industryQuality in apparel and allied products
Quality is measured in three characteristics—durability, utility, and emotional appeal—with respect to the raw materials used, the product design, and the construction of the product.
Read MoreQuality is measured in three characteristics—durability, utility, and emotional appeal—with respect to the raw materials used, the product design, and the construction of the product.
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technology of photographyThe photography industryHigh-quality precision cameras are produced on a smaller scale with automated fabrication of the engineering components but much more extensive manual assembly by highly skilled technicians. Components and functions of every camera are tested at every production stage; less expensive cameras are usually batch-tested by…
Read MoreHigh-quality precision cameras are produced on a smaller scale with automated fabrication of the engineering components but much more extensive manual assembly by highly skilled technicians. Components and functions of every camera are tested at every production stage; less expensive cameras are usually batch-tested by…
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marketingServices marketingVariability can be reduced by quality-control measures. These measures can include good selection and training of personnel and allowing customers to communicate dissatisfaction (e.g., through customer suggestion and complaint systems) so that poor service can be detected and corrected.
Read MoreVariability can be reduced by quality-control measures. These measures can include good selection and training of personnel and allowing customers to communicate dissatisfaction (e.g., through customer suggestion and complaint systems) so that poor service can be detected and corrected.
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production systemUnderlying principles…met, the additional consideration of quality must also be seen as a limiting factor. The quality of a product, measured against some objective standard, includes appearance, performance characteristics, durability, serviceability, and other physical characteristics; timeliness of delivery; cost; appropriateness of documentation and supporting materials; and so on. It is an…
Read More…met, the additional consideration of quality must also be seen as a limiting factor. The quality of a product, measured against some objective standard, includes appearance, performance characteristics, durability, serviceability, and other physical characteristics; timeliness of delivery; cost; appropriateness of documentation and supporting materials; and so on. It is an…
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textileQuality controlTextile fabrics are judged by many criteria. Flexibility and sufficient strength for the intended use are generally major requirements, and industrial fabrics must meet rigid specifications of width, weight per unit area, weave and yarn structure, strength and elongation, acidity or alkalinity, thickness,…
Read MoreTextile fabrics are judged by many criteria. Flexibility and sufficient strength for the intended use are generally major requirements, and industrial fabrics must meet rigid specifications of width, weight per unit area, weave and yarn structure, strength and elongation, acidity or alkalinity, thickness,…
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tobaccoGrading…convenient size and weight for inspection and removal by the buyer. Except during humid periods, the leaf must be conditioned in moistening cellars or humidified rooms before it can be handled without breakage. Type of leaf and local custom determine the fineness of grading. At its most elaborate, grading may…
Read More…convenient size and weight for inspection and removal by the buyer. Except during humid periods, the leaf must be conditioned in moistening cellars or humidified rooms before it can be handled without breakage. Type of leaf and local custom determine the fineness of grading. At its most elaborate, grading may…
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bakingQuality maintenanceBakery products are subject to the microbiological spoilage problems affecting other foods. If moisture content is kept below 12 to 14 percent (depending on the composition), growth of yeast, bacteria, and molds is completely inhibited. Nearly all crackers and cookies…
Read MoreBakery products are subject to the microbiological spoilage problems affecting other foods. If moisture content is kept below 12 to 14 percent (depending on the composition), growth of yeast, bacteria, and molds is completely inhibited. Nearly all crackers and cookies…
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dairy productQuality concernsThe quality of butter is based on its body, texture, flavor, and appearance. In the United States the Department of Agriculture (USDA) assigns quality grades to butter based on its score on a standard quality point scale. Grade AA is the highest possible…
Read MoreThe quality of butter is based on its body, texture, flavor, and appearance. In the United States the Department of Agriculture (USDA) assigns quality grades to butter based on its score on a standard quality point scale. Grade AA is the highest possible…
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cocoaChocolate and cocoa grades…difference from one grade or quality to the next. Chocolate quality depends on such factors as the blend of beans used, with about 20 commercial grades from which to choose; the kind and amount of milk or other ingredients included; and the kind and degree of roasting, refining, conching, or…
Read More…difference from one grade or quality to the next. Chocolate quality depends on such factors as the blend of beans used, with about 20 commercial grades from which to choose; the kind and amount of milk or other ingredients included; and the kind and degree of roasting, refining, conching, or…
Read More- dairy productQuality concerns
Raw milk is a potentially dangerous food that must be processed and protected to assure its safety for humans. While most bovine diseases, such as brucellosis and tuberculosis, have been eliminated, many potential human pathogens inhabit the dairy farm environment. Therefore, it is…
Read MoreRaw milk is a potentially dangerous food that must be processed and protected to assure its safety for humans. While most bovine diseases, such as brucellosis and tuberculosis, have been eliminated, many potential human pathogens inhabit the dairy farm environment. Therefore, it is…
Read More