http://www.qualitymanagers.com/taxonomy/term/121/0 A control chart showing the count of defects per unit in a series of random samples. en http://www.qualitymanagers.com/u-chart <p>A control chart showing the count of defects per unit in a series of random samples.</p> u chart Wed, 15 Nov 2006 16:22:44 -0500 joseph 11 at http://www.qualitymanagers.com