Hardie plank siding is a premium brand of cement board siding (also known as fiber cement board siding) produced by the James Hardie Company.ardie plank can be purchased with a wood-grain look, a plain smooth look or a stucco type finish. Hardie plank also comes in simulated cedar shingle planks.
activity duration. Period (hours, days, weeks) required to complete an activity. Activities with zero duration are called milestones.
DEFINITION of 'Empirical Duration'. The calculation of a bond's duration based on historical data.Empirical duration is estimated statistically using historical market-based bond prices and historical market-based Treasury yields.egression analysis is the statistical process used to estimate empirical duration. Duration is the percentage change in a bond's price with a 100-basis-point change in yield.