2.
Measurement Process Characterization
2.2.
Statistical control of a measurement process
2.2.3.
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How is short-term variability controlled?
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Emphasis on instruments
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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.
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Artifacts - Case study:
Resistivity
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The artifacts must be of the same type and geometry as items that
are measured in the workload, such as:
- Items from the workload
- A single check standard chosen for this purpose
- A collection of artifacts set aside for this specific
purpose
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Concepts covered in this section
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The concepts that are covered in this section include:
- Control chart methodology for standard
deviations
- Data collection and analysis
- Monitoring
- Remedies and strategies for dealing with
out-of-control signals
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