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2. Measurement Process Characterization
2.2. Statistical control of a measurement process


How is short-term variability controlled?

Emphasis on instruments Short-term variability or instrument precision is controlled by monitoring standard deviations from repeated measurements on the instrument(s) of interest. The database can come from measurements on a single artifact or a representative set of artifacts.
Artifacts - Case study: Resistivity The artifacts must be of the same type and geometry as items that are measured in the workload, such as:
  1. Items from the workload
  2. A single check standard chosen for this purpose
  3. A collection of artifacts set aside for this specific purpose
Concepts covered in this section The concepts that are covered in this section include:
  1. Control chart methodology for standard deviations
  2. Data collection and analysis
  3. Monitoring
  4. Remedies and strategies for dealing with out-of-control signals
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