Linearly-priced goods

Figure: Linearly-priced goods

Many categories of goods are simply priced linearly as a function of ‘quantity’, e.g:

Many of these are of sufficient societal impact that measurement is subject to legal metrological regulation.

  • Example: In a medium-sized country (e.g. Sweden) there are typically over 5 million vehicles each averaging 15600 km/year, each consuming typically 0.2 L/km. At a petrol price of 1.1€/L, the annual national cost of petrol consumption is then 20 G€! Legal metrological limits (MPE) on displayed error for petrol dispensers are typically ± 0.5%. A maximum permissible uncertainty (MPU) when testing a dispenser of (MPE/3) correspond to an annual national cost of about ± 33 M€. (Taxation at 25% of petrol transactions could cover the costs of a national legal metrology authority to regulate the sector.)

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References

H Källgren and L R Pendrill 2006 Exhaust gas analysers and optimised sampling, uncertainties and costs”, Accreditation and Quality Assurance – Journal for Quality, Reliability and Comparability in Chemical Measurement. Vol 11, 496- 505 http://dx.doi.org/10.1007/s00769-006-0163-3

L R Pendrill 2007, “Optimised Measurement Uncertainty and Decision-Making in Conformity Assessment“, NCSLi Measure, Vol. 2 No. 2 • June 2007, pp. 76 – 86

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