PERPETUAL is a fixed income security with no maturity date, such as a preferred stock with no sinking fund.
PRODUCTIVITY RATIO is the ratio of outputs to inputs. The closer the ratio is to 1.0, the higher the productivity; the closer the ratio is to 0.0, the lower the productivity. Productivity is important because it relates to an organizations ability to compete, and to the overall wealth and standard of living of a nation. Productivity is affected by work methods, capital, quality, technology, and management.
LABOR THROUGHPUT VARIANCE reveals potential constraints on throughput caused by changes in the mix of products being produced. It is computed the way the traditional labor "efficiency" variance is computed but aggregated at a fairly high level (e.g., total plant or total department) and expressed as percent of actual clocked production hours vs. standard production hours.
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