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Atom economy. Atom economy (atom efficiency/percentage) is the conversion efficiency of a chemical process in terms of all atoms involved and the desired products produced. The simplest definition was introduced by Barry Trost in 1991 and is equal to the ratio between the mass of desired product to the total mass of reactants, expressed as a percentage.
A good fixed asset turnover ratio depends on the industry, but a ratio of 3:1 or higher is typically considered strong. It shows that a company can earn at least $3 in sales for every $1 spent on ...
The simplest metrics are based upon the mass of materials rather than their impact. Atom economy, E-factor, yield, reaction mass efficiency and effective mass efficiency are all metrics that compare the mass of desired product to the mass of waste. They do not differentiate between more harmful and less harmful wastes.
The return on assets (ROA) ratio developed by DuPont for its own use is now used by many firms to evaluate how effectively assets are used. It measures the combined effects of profit margins and asset turnover. [3]
Assume company Zander has the following numbers: Average total Assets = ($40,000 + $80,000) ÷ 2 = $60,000. Asset turnover ratio = $125,00 ÷ $60,000 = 2
Indeed, three are the atoms in the middle layer (inside the prism); in addition, for the top and bottom layers (on the bases of the prism), the central atom is shared with the adjacent cell, and each of the six atoms at the vertices is shared with other six adjacent cells. So the total number of atoms in the cell is 3 + (1/2)×2 + (1/6)×6×2 = 6.
Total asset turnover ratios can be used to calculate return on equity (ROE) figures as part of DuPont analysis. [5] As a financial and activity ratio, and as part of DuPont analysis, asset turnover is a part of company fundamental analysis. [6]
Total Time: 8-hour shift or 28,800 seconds, producing 14,400 parts, or one part every 2 seconds. Fastest possible cycle time is 1.5 seconds, hence only 21,600 seconds would have been needed to produce the 14,400 parts. The remaining 7,200 seconds or 2 hours were lost.