metrology
Let an agent explain metrology and its branches, relay the SI, traceability and uncertainty concepts from BIPM and standards sources, describe applied and legal metrology, and distinguish metrology from meteorology and from measurement scales in statistics.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain metrology and its branches, relay the SI, traceability and uncertainty concepts from BIPM and standards sources, describe applied and legal metrology, and distinguish metrology from meteorology and from measurement scales in statistics.
The science of measurement and its application, covering the definition of units and realisation of standards, the calibration and traceability of instruments, the evaluation of measurement uncertainty, and applied fields such as legal metrology for trade, industrial metrology, forensic metrology, environmental monitoring with instruments such as air quality monitoring equipment, and the theory of measurement scales including nominal, ordinal, interval and ratio levels used in the social sciences and in rating scales such as performance status or the Torino scale.
What it is for: Ensuring reliable and comparable measurement.
It can be explain the science and branches; relay SI, traceability and uncertainty; describe applied fields; distinguish related concepts.
Distinguishing features
Units and standards
Traceability chains
Uncertainty evaluation
Legal and applied branches
What it looks like
Not a visible object; standards, laboratories and instruments.
Physical character
SI base units: 7 count
SI redefinition: 2019 year - constants-based
Metre Convention: 1875 year
How it is recognised
Science of measurement
Scientific, industrial, legal and forensic metrology; measurement scales and levels
Meteorology studies weather; statistics analyses measured data; instrumentation builds instruments
Related models
is a kind of - in registry terms
is governed by - under the Metre Convention
defines - the SI
is applied in - and testing
In practice
Families and kinds
scientific metrology and the SI
industrial metrology and calibration
legal metrology for trade and safety
forensic metrology
environmental and health measurement including air quality monitoring
measurement theory and levels of measurement such as nominal, ordinal, interval and ratio scales
rating scales such as performance status and the Torino scale as ordinal measures
Standards and regulation
Metre Convention and BIPM
SI Brochure
ISO/IEC 17025 for laboratories
OIML recommendations and national legal metrology laws
GUM and VIM guides on uncertainty and vocabulary
Failure modes and hazards
Broken traceability and uncalibrated instruments
Confusing metrology with meteorology
Treating ordinal scales as interval data
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.metrology
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What metrology is.
Definition.
Definition
Definition and branches.
Definition
Definition.
- What is metrology, and what are its scientific, industrial and legal branches? definition
- Is the question about metrology, meteorology, statistics or a specific rating scale? boundary
Concepts
Core concepts.
Concepts
Concepts.
- What are units, standards, traceability, calibration and measurement uncertainty? definition
- Which entry fits the specific concept? action
System The SI and institutions.
Standards.
SI
The SI.
SI
SI.
- How is the SI defined since 2019, and how are units realised? provenance
- Which references are standard? provenance
Institutions
Institutions.
Institutions
Institutions.
- What do BIPM, national metrology institutes and OIML do? provenance
- Which entry fits the specific institution? action
Apply Applied metrology.
Practice.
Legal
Legal and forensic metrology.
Legal
Legal.
- How does legal metrology govern trade instruments, and what is forensic metrology? provenance
- Which sources are cited? provenance
Monitoring
Monitoring instruments.
Monitoring
Monitoring.
- How are instruments such as air quality monitors calibrated and their data made traceable? provenance
- Which entry fits air quality monitoring? action
Context Scales and history.
Context.
Scales
Levels of measurement.
Scales
Scales.
- What are nominal, ordinal, interval and ratio scales, and how do rating scales such as performance status fit? provenance
- Which entry fits level of measurement? action
History
History.
History
History.
- How did measurement standards develop from ancient units to the Metre Convention and the constants-based SI? provenance
- Which entry fits the history of measurement? action
What the second pass must settle
- Should legal metrology and level of measurement be separate primary entries?
- How should BIPM and ISO sources be linked?
- The registry entry has merged aliases naming instruments and rating scales; should they be split off?