Minimum average roll value

For commercial geotextUe products, not only are the characterisation methods chosen crucial for their apphcation performances, but also the reliability and reproducibility of the properties measured are critical for their quality assurance. Therefore, statistical values of the measured properties and performance of geotextiles of large batches such as minimum average roll values (MARVs) and typical values are usually required for the certain key properties of a batch of nonwoven geotextiles both of the two terms are defined based an assumption that the data obtained are statistically in normal distribution. 

Minimum average roll values, machine direction only. 

Minimum average roll value (MARV) The value which historically yields a 97.7% confidence level. This value is defined as the average minus 2 standard deviations for a specific test method for a specific type of textile. 

The maximum CR of the aggressive investor with a 3-year horizon, for example, is 21.8% (row 3, column 4). A value of 19.4% in row 6, column 4 (quantile 95% for the aggressive investor) means that only 5% of the optimized portfolios realized a value higher than 19.4% in the 239 rolling calculations of the 3-year horizon. For the 10-year horizon and a risk averse attitude, the minimum CR was 7.2% per annum (row 4, column 7). The average CR for this investment horizon for the risk averse investor was 11.5% (row 9, column 7). 

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