Measuring instrument management in ISO quality management system environment

Lua, Kheng Leong (2020) Measuring instrument management in ISO quality management system environment. MPhil thesis, University of Nottingham.

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Abstract

Measuring instrument accuracy and consistently meeting measurement accuracy are the two main issues of argument especially when product conformity is based on the measured results ultimately affect organisation profit. ISO quality management systems required measuring instrument to meet requirements; however, there is no specific instruction on how to determine measuring instrument is fit for purpose and continuously to do so. The practices become individualistic and apparently lack of monitoring mechanism to prove that these methods could statistically and or logically justified.

This study researches into process of instrument management from early stage of recording the identity to activities to ensure fitness for use at all time of usage. This study proposes some mathematical models and charting techniques to tackle the research problem. Experiments were conducted with the help of a SAMM accredited calibration laboratory to collect information to investigate implementation feasibility. The contributions can be grouped into two parts they are the formulation of equations involve in measuring instrument capacity, capability and compensation for correction. Whereas second part is using control charts techniques to prove long term continuous meeting fitness for purpose.

Control charts are introduced as intermediate check procedures to qualify the instrument at any time. The technique is completely different from traditional statistical process control chart. There are five different charting techniques meant for various instrument accuracies. The novel part of the study is researching into performing intermediate check for reference standards using ABC chart. There is no doubt that these procedures are more complicated than the traditional methods; however, they are convincing due to the use of statistics couple with the current concept of metrological traceability. The application for patent is in progress.

Item Type: Thesis (University of Nottingham only) (MPhil)
Supervisors: Abakr, Yousif Abdalla
Keywords: ISO quality management systems, measuring instrument, metrological traceability
Faculties/Schools: UNMC Malaysia Campus > Faculty of Engineering > Department of Mechanical, Materials and Manufacturing Engineering
Item ID: 61070
Depositing User: LUA, Kheng
Date Deposited: 27 Jul 2020 13:38
Last Modified: 27 Jul 2020 13:45
URI: http://eprints.nottingham.ac.uk/id/eprint/61070

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