
Key: SMM31

Legacy Issue Number: 14609

Status: closed

Source: Benchmark Consulting ( Alain Picard)

Summary:
Scales of Measurement are a fundamental property of a measure describing the allowable mathematical transformations that can be legitimately applied to it.
Discussion:
Attached are some URLs that will give you an overview of Scales of Measurement. They are a fundamental property of a measure describing the allowable mathematical transformations that can be legitimately applied to it. Since they therefore determine the statistical methods that can be applied to the measure, they need to be treated as a first level attribute of a measure.
http://www.math.sfu.ca/~cschwarz/Stat301/Handouts/node5.html
http://en.wikipedia.org/wiki/Scale_of_measurement (not always written in easily understood terms)
http://www.wadsworth.com/psychology_d/templates/student_resources/workshops/stat_workshp/scale/scale_01.html (tutorial  behavioral science view)Summary of change:
· Add enumeration MeasurementScale
o Add enu ordinal, nominal, interval and ratio.
· Add attribute scale:MeasurementScale to Measure class
o This defines the scale of Measurement for measurements produced by the measure. 
Reported: SMM 1.0b1 — Sat, 31 Oct 2009 04:00 GMT

Disposition: Resolved — SMM 1.0b2

Disposition Summary:
Add named relation operation [0..1] from CollectiveMeasure to Operation
Add constraint specify that either an Accumulator or an Operation, but not both should be specified for instances of CollectiveMeasure.
Add documentation to clearly identify the defined uses of the NamedMeasure class. 
Updated: Fri, 6 Mar 2015 20:58 GMT
SMM — Clarify role of NamedMeasure
 Key: SMM31
 OMG Task Force: Structured Metrics Metamodel (SMM) FTF