The Adjusted p Chart and u Chart for Varying Sample Sizes

Article

Rocke, David   (1990, ASQC)   University of California

Journal of Quality Technology    Vol. 22    No. 3
QICID: 11280    July 1990    pp. 206-209
List $10.00
Member $5.00

FOR A LIMITED TIME, ACCESS TO THIS CONTENT IS FREE!
You will need to be signed in.
New to ASQ? Register here.

Article Abstract

It is common to have control charts for fraction of nonconforming items or number of nonconformities that are based on differing sample sizes for each observation. This paper presents a simple method for charting such data that is as easy to interpret as a control chart for fixed sample size and that has the same chance for an observation to lie beyond the control limits as a control chart with limits computed separately for each observation.

Keywords

Statistics,Control charts,Sample size,Poisson distribution


Browse QIC Articles Chronologically:     Previous Article     Next Article

New Search

Featured advertisers





ASQ is a global community of people passionate about quality, who use the tools, their ideas and expertise to make our world work better. ASQ: The Global Voice of Quality.