CASoft is a software that enables risks associated with decision-making in conformity assessment to be managed when measurement uncertainty is to be taken into account. In particular, CASoft aims to support the practical application of the methodology described in the reference document “The role of measurement uncertainty in conformity assessment” JCGM106:2012 .
In conformity assessment, two kinds of risks of incorrect decisions can be considered and evaluated :
For both kinds of risks, there is both a consumer’s risk where non-conforming items are incorrectly accepted (“safety or security risk”) and a producer’s risk where conforming items are incorrectly rejected (“economic risk”).
CASoft is a software developed in MATLAB® and made freely available as an executable without any requirement for the purchase of a MATLAB® license. Developed jointly by LNE (France), NPL (United Kingdom) and RISE (Sweden) in an EMPIR funded “Support for Impact” project , it operates within Microsoft® Windows (and has been tested on Windows 7 and later). It requires the installation of a suitable MATLAB Compiler Runtime (MCR) library: MCR R2019b (9.7)
Version 2 available since december 2020 for downloading
The calculation of such risks according to JCGM106:2012 can involve the evaluation of complicated integrals. CASoft offers the possibility to calculate such risks using a dedicated and intuitive user interface. CASoft can be used whether prior information about the measured items is available or not.
Different objectives can be achieved using CASoft:
Anyone involved in the process of decision-making in conformity assessment may benefit from using CASoft, including:
 BIPM, IEC, IFCC, ISO, ILAC, IUPAC, IUPAP and OIML, JCGM106:2012, The role of measurement uncertainty in conformity assessment, 2012
 EMPIR 17SIP05 CASoft webpage
 Pendrill et al., A guide to decision-making and conformity assessment, 2015.
This project has received funding from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme. EURAMET is not responsible for any use that may be made of the information it contains.