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basics of quality control

December 1, 2020 Uncategorized

Example 3: four different styles of garments from a good factory. doing a full function test as per claims on the retail box). Quality control (QC) is a procedure or set of procedures intended to ensure that a manufactured product or performed service adheres to a defined set of quality criteria or meets the requirements of the client or customer. Flowcharting. As we have already discussed, organizations can define their own internal quality standards, processes and procedures; the organization will develop these over time and then relevant stakeholders will be required to adhere by them. The inspector can really check every detail, including counting the total quantity and confirming the packaging. What is an inspection level? As fewer samples have to be checked, the inspection might take less time and be cheaper. Principles of quality control refer to the various concepts that make up an organization's quality assurance program. The Check sheet is used to collect data and information in an easy format. Is it expensive to increase the quality level in a factory? The first two parts focused on the different inspection levels and on the AQL tables. In this article, I explain three fundamental concepts that every buyer should be familiar with when it comes to quality control and inspections: After 10 minutes, you will be able to (1) understand the reliability of an inspector’s findings and (2) take more informed decisions based on an inspection report. It's easy to subscribe to our newsletter where you'll receive weekly updates for professional importers and manufacturers on better understanding, controlling, and improving manufacturing & supply chain in China. @ Muhammad: Check Sheet. Inspectors frequently have to perform some special tests on the products they are checking. A Histogram is a bar graph used to present frequency data. See part 1 of this article: It increases … Infographic: how a random inspection works, 4 simple steps for starting to do quality control, The 4 ways of checking product quality before shipment, Quality inspection services: in-depth descriptions Amir hossin. Quality control is a process that helps a company make sure it creates quality products and that staff and management alike make minimal mistakes. Let’s say you follow the usual practice of tolerating 0% of critical defects, 2.5% of major defects, and 4.0% of minor defects. Virtually any process can benefit from the quality tools and techniques you'll find here. As the 4 products might not all be processed at exactly the same time, it might be preferable to send an inspector at different times. Tired of reading long articles? Most importers do not know how professional quality control is conducted. You buy 8,000 widgets from a factory, and you choose inspection level II. Quality inspection services: in-depth descriptions, Infographic: understanding sampling plan calculations, Laboratory testing in China: ideas for optimization, How your inspectors can fail to notice quality problems, All the Basics About the Metal Welding Process [Videos], How To Cooperate With Your Chinese Supplier, Part 10: Jewelry & Gold Plating Problems: Exploring the process and controlling quality, The Impact Of Chinese New Year On Importers & Tips To Prepare For CNY 2021 [Podcast], Documenting Your Company’s Quality Standard into the Details, Is Your New Product Design Ready for Manufacturing in China? Many people get confused between quality control (QC) and quality assurance (QA). Required fields are marked *. Four additional special levels, S-1, S-2, S-3 and S-4 are also given in Table 1 and may be used where relatively small sample sizes are necessary and larger sampling risks can be tolerated.” and “The inspection level required for any particular application shall be specified by the responsible authority. High-level Ops Process Flow A. Batch Verification B. Ops In process Verification C. Manufacturing Sample Inspection D. BOM Verification 6. The article is very informative which is worth reading it. I will suggest to him to contact a material testing company so that they can grade the quality of the job and material. Your email address will not be published. A quality control officer has to develop and organize special activities, and they plan to meet and maintain quality standards of manufactured products. The letter L gives you the number of samples to draw at random: 200 pcs. please send me. Yes, the latest version of MIL-STD 105 and the commercial standards that replaced it. So we have three “general” inspection levels, and four “special levels”. From the buyer’s perspective, quality control activities help confirm that a batch of products meet specifications. Tweet Renaud here or hit the button below to get in touch.

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