http://www.qualitymanagers.com/taxonomy/term/95/0 Control chart in which the range of the subgroup is used to track the instantaneous variation within a process, i.e. the variation in the process at any one time, when many input factors would not have time to vary enough to make a detectable difference. en http://www.qualitymanagers.com/range-chart <p>Control chart in which the range of the subgroup is used to track the instantaneous variation within a process, i.e. the variation in the process at any one time, when many input factors would not have time to vary enough to make a detectable difference. Range charts are usually paired with average charts for complete analysis.</p> Range Chart Wed, 15 Nov 2006 16:33:53 -0500 joseph 37 at http://www.qualitymanagers.com