the metric system is the measurement system whose divisions are powers of ten.
the metric system is the measurement system whose divisions are powers of ten.
measurement system whose divisions are powers of ten?
the metric system
the measurement system during the time of the mughal emperor, akbar, the "guz" was the measure of length. the "guz" was widely used till the introduction of the metric system in india in 1956. during the british period, efforts were made to achieve uniformity in weights and measures. a compromise was reached in the system of measurements which continued till india's independence in 1947. after independence in 1947, it was realized that for fast industrial growth of the country, it would be necessary to establish a modern measurement system in the country. the lok sabha in april 1955 resolved : "this house is of the opinion that the government of india should take necessary steps to introduce uniform weights and measures throughout the country based on metric system".
national physical laboratory of india
it is important to understand the difference between accuracy and precision to understand the purpose of gage r&r. gage r&r addresses only the precision of a measurement system. it is common to examine the p/t ratio which is the ratio of the precision of a measurement system to the (total) tolerance of the manufacturing process of which it is a part. if the p/t ratio is low, the impact on product quality of variation due to the measurement system is small. if the p/t ratio is larger, it means the measurement system is "eating up" a large fraction of the tolerance, in that the parts that do not have sufficient tolerance may be measured as acceptable by the measurement system. generally, a p/t ratio less than 0.1 indicates that the measurement system can reliably determine whether any given part meets the tolerance specification. a p/t ratio greater than 0.3 suggests that unacceptable parts will be measured as acceptable (or vice versa) by the measurement system, making the system inappropriate for the process for which it is being used.
anova gauge r&r