Identifying and reducing measurement variation is the whole reason for doing gage repeatability and reproducibility (R and R) studies. To help novices and experts, this month's Web review looks at sites related to Gage R and R studies. These sites explain how to conduct a study and provide step-by-step solutions to common Gage R and R problems.
www.itl.nist.gov/div898/handbook/mpc/section4/mpc4.htm. This page comes from the Engineering Statistics Handbook, section 2.4, which discusses Gage R and R studies. The page is set up in an outline format with links to other sections in the handbook. For example, clicking on the first question: What are the issues for a Gage R and R study?, a page labeled 2.4.1 comes up. Each topic, such as Repeatability, Reproducibility, Stability and Bias all link to other pages or sections in the handbook that describe what each term is and how it relates to Gage R and R. Click Stability on the Gage R and R main page, then click Resistivity probes under the term case study. What comes up is the purpose and an outline of linked terms for that study. If a visitor scrolls down the Gage R and R main page, there are linked goals that explain how to test resolution of instruments or estimate the differences between gages. Or, there are other questions to click on, such as what are the design considerations for the study? How do we collect data? How do we quantify variability of measurements? There is also a link to Remedies and strategies. A visitor will find good information regarding Gage R and R studies. This is a good site to bookmark for a reference.