{"id":42580,"date":"2014-03-16T08:44:42","date_gmt":"2014-03-16T03:14:42","guid":{"rendered":"http:\/\/vskills.in\/certification\/tutorial\/?p=42580"},"modified":"2024-04-12T14:19:44","modified_gmt":"2024-04-12T08:49:44","slug":"rational-subgrouping-2","status":"publish","type":"page","link":"https:\/\/www.vskills.in\/certification\/tutorial\/rational-subgrouping-2\/","title":{"rendered":"Rational Subgrouping"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><a ref=\"magnificPopup\" href=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/HR-AUDIT-METHODS-1-1.png\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"400\" src=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/HR-AUDIT-METHODS-1-1.png\" alt=\"Rational Subgrouping\" class=\"wp-image-94483\" srcset=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/HR-AUDIT-METHODS-1-1.png 750w, https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/HR-AUDIT-METHODS-1-1-300x160.png 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><\/figure><\/div>\n\n\n<p><strong>Rational Subgrouping<\/strong>&#8211; Rational Subgrouping\u00a0is a method in which data is organized into subgroups for process control charts. Rational subgroups for process control charts involve the use of process and product knowledge and judgment, but there are a few basic principles that should be followed.<\/p>\n<ul>\n<li>Usually, the subgroups should be chosen so that within subgroup variation is minimized. For example, keep in mind that for an Average and Range chart, it is the within subgroup variation that determines how sensitive the chart will be since the average Range (R-bar) is used in the calculation of the Averages chart control limits.<\/li>\n<li>The selection of rational subgroups should be consistent with the structure of the data from the process.<\/li>\n<li>The selection of rational subgroups should allow for quick identification of potential corrective actions once an out-of-control condition is identified.<\/li>\n<\/ul>\n<p>For instance, a process might require the filing of one-gallon cans of an expensive liquid using a machine with three filling heads. The operator has taken some initial data on the process and is trying to decide how to organize it into a process control chart. The initial data is given below. The characteristic being measured is filled volume (in gallons).<\/p>\n<div class=\"apply\">\n<p>Test Your Six Sigma Black Belt Skills By Taking Our Practice Tests on This <a href=\"http:\/\/www.vskills.in\/practice\/quiz\/Six-Sigma-Black-Belt\">Link<\/a><\/p>\n<p><span style=\"font-weight: 400;\">Become Vskills Certified Six Sigma Black Belt Professional. 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Rational subgroups for process control charts involve the use of process and product knowledge and judgment, but there are a few basic principles that should be followed. Usually, the subgroups should be chosen so that within subgroup variation&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[3897,6280],"tags":[9750,9747,9749,9751,9748,6848,6913,6871],"class_list":["post-42580","page","type-page","status-publish","hentry","category-quality","category-six-sigma-black-belt-quality","tag-certified-six-sigma-black-belt-professional-course-outline","tag-certified-six-sigma-black-belt-professional-exam-details","tag-certified-six-sigma-black-belt-professional-free-practice-test","tag-certified-six-sigma-black-belt-professional-online-tutorial","tag-certified-six-sigma-black-belt-professional-preparatory-guide","tag-quality","tag-rational-subgrouping","tag-tutorials"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Six Sigma Black Belt Tutorial | Rational Subgrouping<\/title>\n<meta name=\"description\" content=\"Rational Subgrouping is a method in which data is organized into subgroups for process control charts. 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