Before we move on to review the history of quality management, let’s briefly discuss the word grade here. You may see people mix up the word grade with quality, but there is a difference. In quality management, there should be no such thing as low quality or high quality. As long as we have a product meeting our requirements, it is a quality product. Grade is a category or rank given to different quality requirements for products of the same function. For example, high grade cars such as Lexus and Mercedes may have lots of features or benefits compared to a premium grade car such as Hyundai. All are quality products as long as they meet the requirements of the customers. The difference is the grade of the product.
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