
Key: SMM1283

Legacy Issue Number: 14608

Status: closed

Source: CAST Software ( Bill Curtis [X] (Inactive))

Summary:
Scales of Measurement are a fundamental property of a Measure describing the allowable mathematical transformations that can be legitimately applied to it.
Attached are some URLs that will give you an overview of Scales of Measurement. 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)
It is proposed to introduce an Enumeration to define the possible Scales of Measurement: ordinal, nominal, interval and ratio. Also to add an attribute to Measure, to define its scale. 
Reported: SMM 1.0b1 — Sat, 31 Oct 2009 04:00 GMT

Disposition: Closed; No Change — SMM 1.2

Disposition Summary:
Scale of Measurement was implemented already
Scale of Measurement has already been implemented in SMM 1.1.

Updated: Mon, 2 Apr 2018 18:08 GMT
SMM12 — Add support for Scale of Measurement
 Key: SMM1283
 OMG Task Force: Structured Metrics Metamodel 1.2 RTF