Library
Newsletter Archive - full copies of past Division newsletters
Statistics Body of Knowledge - our library content below focuses on the topics in this listing.
Six Sigma, Measurement Systems, and the Hidden Factory
Mini Paper Appearing in Spring 2003 Newsletter
Measurement systems ineffectively designed and implemented may contribute to the inefficiencies of “the hidden factory”. This Mini Paper presents an approach to avoid these inefficiencies...
- Filetype: pdf
- Publish date: 2003-03
- Keywords:Cost of poor quality (COPQ), Gage repeatability and reproducibility (R&R) analysis, Precision to tolerance (P/T) ration, X-bar and R chart
Accounting for Measurement System Variability
Mini Paper Taken from the Fall 1999 Newsletter
This paper illustrates how to adjust for measurement system variability when evaluating process variability...
- Filetype: pdf
- Publish date: 1999-11
- Keywords:Variability, Measurement system variability, Control charts, X-bar and R chart, Capability, Cpk
Process Capability Indices
Mini Paper Appearing in Winter 1999 Newsletter
This paper presents the definitions of several capability indices and explains why they can sometimes lead to flawed decisions...
- Filetype: pdf
- Publish date: 1999-01
- Keywords:Process capability, X-bar and R chart, Special cause, Common cause, Variability
Using a Graphical Technique for Determining and Displaying Process Capability
Basic Tool Appearing in Summer 1997 Newsletter
This article demonstrates how to assess the capability of your process by calculating multiple capability indices (such as Cpk) over time and then plotting them on an XmR control chart along with a histogram of the individual values...
- Filetype: pdf
- Publish date: 1997-06
- Keywords:Cpk, I and MR chart, X-bar and R chart
Autocorrelated Data and SPC
Mini Paper Taken from the Summer 1993 Newsletter
This paper explains time dependent autocorrelation and proposes ways to deal with its effects on statistical control charts...
- Filetype: pdf
- Publish date: 1993-06
- Keywords:Autocorrelation, Control charts, Shewhart chart, X bar, CUSUM chart, Exponentially weighted moving average (EWMA) chart, Residuals
Shewhart Charts
Mini Paper Taken from the Spring 1993 Newsletter
This paper addresses disagreements between proponents of traditional Shewhart control charts and proponents of Pre-Control...
- Filetype: pdf
- Publish date: 1993-03
- Keywords:X-bar and R chart, Individuals and moving range chart, Median and range chart, Pre-control, Statistical process control, Process improvement
Some Aspects of Sampling for Control Charts
This paper focuses on producing meaningful sampling plans for control charts...
- Filetype: pdf
- Publish date: 1992-06
- Keywords:X and MR chart, X-bar and R chart, Special cause, Randomization
A Tool for Teaching on the Front Lines of Quality
Mini Paper Appearing in Summer 1986 Newsletter
A form is presented to assist workers in calculating the control limits on an X bar and R chart...
- Filetype: pdf
- Publish date: 1986-06
- Keywords:Control charts, Quality control, X-bar and R chart
Choosing Subgroup Size on the Basis of Control Chart Sensitivity for X-Bar Charts
Paper Appearing in Fall 1985 Newsletter
This paper explores the relationship of the subgroup size and the sensitivity of X-bar..
- Filetype: pdf
- Publish date: 1985-11
- Keywords:X-bar Chart, Sensitivity analysis, Control limits, Subgroup Size