Several investigations in the past. have looked for a correlation between height. and arm span (1-5). Such correlation is. useful to predict height in subjects in whom. it cannot be reliably measured due to. debility or structural defects (1-3).
Net realizable value. Net realizable value (NRV) is a method of evaluating a fixed or current asset's worth when held in inventory, in the field of accounting.
NPV is a measure of the absolute welfare gain over the whole life of the project. Future benefits and costs are discounted at a compound rate, r, typically 12% per annum. Benefits, net of costs, are then summed across all years. Box 1 shows how the calculations are made.