Panduan pengiraan ketidakpastian
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Date
2003
Authors
Budin, Salina
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Abstract
Measurement is one of the important for process controlling, quality controlling
and equipment verification. Measurement process produces uncertainty which
generate from measurement errors. Estimation uncertainty value is necessary as
stated in ISO 10012-1 (1992). ISO 9001 (1994) stated that ISO 10012-1 ( 1992) 'may
be used as reference' for clause 4.11 but new ISO revision, ISO 9001 (2000)
indicated ISO 10012-1 (1992) as a compulsory reference for clause 7.6. The
accuracy of calibration process can not be determined without uncertainty
estimation.
Two guidelines that have been used in development of this uncertainty estimation
calculation are 'Guidelines for Estimation and Statement of Overall Uncertainty In
Measurement Result' and 'Guidelines for Evaluating and Expressing the
Uncertainty of NISI Measurement Results'. But both of the guidance is hardly
understood. Thus, this research was conducted to produce uncertainty estimation
guideline in more clear and practical approach. This guideline consist with all
mathematical formula which involved in uncertainty calculation, whereby it
provides an advantage compared to current automatic calculation format.
This research will start with the development of a calibration system model. It is
important to get a better understanding about the relationship between uncertainty
and calibration. The process followed by the design of uncertainty calculation
guideline. This guideline also include development of automatic uncertainty
calculation format. In this development, we are able to see the relationship
between statistic and uncertainty calculation. Finally the researched would involve
true calibration data whereby two set of true calibration data will be stored m an
automatic uncertainty calculation format that has been developed previously. From
these examples, we could clearly see how uncertainty affects the calibration
process and explain why uncertainty is important and required in all calibration
process.
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Pengiraan ketidakpastian