SAFETY STOCK (SS) or security stock ensures that the item is available up to the pre-defined required service level, even when the re-ordered material arrives later then expected, or the fluctuations in demand during the lead-time cause the demand to be larger then expected. See also STOCK RESERVE.
VISUAL-FIT METHOD is a cost estimation method where an analyst examines a cost by plotting points on a graph (called a scatter diagram) and places a line through the points to yield a cost function. This method is more objective than the account-classification method, but it is still lacking because two cost analysts could (and likely would) visually fit different lines. Such an approach is useful, though, because it helps spot non-representative data points, or outliers.
MONETARY UNIT ASSUMPTION assumes that values can be relevantly measured in current monetary units. It is not necessary that the currency be stable or that inflation effects be negligible. The discount rate (cost of capital) automatically takes into account expected inflationary effect on dollar or inventory values for the specific entity. This supports economic valuation and enhances comparability.
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