Modeling in measurement science: from the prescriptive model to the descriptive model for the practical implementation of the former
Journal Title: Системи обробки інформації - Year 2018, Vol 23, Issue 4
Abstract
In measurement science the object of a measurement is called “measurand”. It is defined in VIM:2012 clause 2.3 as “quantity intended to be measured” (but in GUM:1995, B.2.9 it is defined instead according to VIM:1993 clause 2.6 “particular quantity subject to measurement”. In VIM:2012, NOTE 1 to clause 2.3 specifies “the specification of a measurand requires … description [i.e., a model] of the state of the phenomenon, body, or substance”. The concept of measurand should be shared by the relevant Community, because the same measurand is supposed to be the object of replicated measures that must be comparable, i.e., it should be recognised as a quantity having a current recognisable meaning for the community. In the dialect of the science philosophers, this means that it should be projected into a “social framework”. Also in the scientific frame this means that the measurand model must be of the “prescriptive” type, meaning “giving directions or injunctions”— not always meaning “physical model”. The design of an experiment (DoE) must start from this initial conceptual model of the measurand, “socially shared”, not from the building up of the descriptive model (often called the “experimental model”) of the measuring system, which is specific to each measurement arrangement. Also each measuring system must be modelled, based on the specific solutions that are chosen in order to implement the prescription in each experiment. The initial conceptual model, being independent on any specific experimental implementation, is clearly a highly idealised one. It does not even allow appreciating the experimental difficulties and compromise (which are graduated depending on the target uncertainty). They arise from three categories of sources indicated in the VIM:2012: 1) the phenomenon, body, or substance; 2) the measuring system; 3) the conditions under which the measurement is carried out. A corresponding model must describe the measurement conditions (often called “physical”, “experimental” or “observation” model—here it does not necessarily correspond to any of them). The paper discusses the non-simple roadmap bringing from the prescriptive model to the descriptive one.
Authors and Affiliations
Павезе Франко
Keywords
Related Articles
- EP ID EP438507
- DOI 10.30748/soi.2018.155.19
- Views 52
- Downloads 0
Система електронного голосування на основі технології блокчейн
Стаття присвячена розробці системи електронного голосування, яка реалізована на основі технології блокчейн. У статті проаналізовані основні недоліки існуючих системи електронного голосування та запро-понована принципово...
Розробка туристичного маршруту за допомогою геоінформаційних технологій
У статті описані проблеми, пов'язані зі станом туристичних послуг в Україні, а саме в місті Харкові. Річ у тому, що цей сегмент ринку послуг не досить розвинений. І саме тому частка внеску від туристичного бізнесу у вало...
Review of contemporary systems for aircraft self-protection using towed decoys
An analysis of open source references is given regarding the contemporary systems for the aircraft self-protection that employ the towed decoys. Actual information on such system is scarce, even though the general ad-ver...
Определение поправок на нестабильность средств измерений
В связи с тем, что пока не выработан приемлемый подход к определению значения поправки к показа-ниям СИ на нестабильность, этот вопрос по-прежнему остается актуальным у специалистов и руково-дителей метрологических служб...
Estimation of uncertainty measurement of parameters of the external magnetic field of technical means
A methodology for estimating the uncertainty of indirect measurements of the magnitude of the magnetic mo-ment created by an external magnetic field of a technical device is proposed. Previously, to estimate the measured...