Gauge Stability

The BIS.Net Team BIS.Net Team

The objective of a Gauge Stability Study is to see how consistent repeatability and bias is over time.

Historically this has been done with Control Charts.

On a periodic basis, daily, weekly, or monthly take a convenient number of readings, such as 5 and plot the bias on a standard X-Bar and Range or Sd chart. If there are no out-of-control signals the process is deemed to be stable. Out-of-control points on the x-bar charts indicate instability with bias. Out-of-control points on the Range/Sd charts indicate instability with repeatability.

Used to study bias stability
Used to study repeatability stability

An alternative stability analysis can be performed with Dynamic Process Performance charts which show changes in bias, and repeatability on the same charts, such as shown below.

Download the Inferences APP, comprised of mainstream and machine-powered analytics for statistical analysis

Analytics as a Service (AaaS) for Quality

Drive quality improvement through actionable insights using analytics you can trust! Use up to 200 analytics tools downloadable through a suite of Apps!

FREE usage of the analytics Apps for quality improvement
  • Augmented with machine-powered smarts
  • Always updated with the latest tools and features
  • No licencing or fixed subscriptions - Pay ONLY for the analysis you run from 20 USD cents per analysis, billed monthly! Set a budget so you don't exceed!