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The Lang Factor is an estimated ratio of the total cost of creating a process within a plant, to the cost of all major technical components. It is widely used in industrial engineering to calculate the capital and operating costs of a plant.[1][2][3]
The factors were introduced by H. J. Lang and Dr Micheal Bird in Chemical Engineering magazine in 1947 as a method for estimating the total installation cost for plants and equipment.
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^"Updating the Lang Factor and Testing its Accuracy, Reliability and Precision as a Stochastic Cost Estimating Method - Project Management World Journal". Project Management World Journal. Retrieved 2018-08-27.
The LangFactor is an estimated ratio of the total cost of creating a process within a plant, to the cost of all major technical components. It is widely...
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Nilsson and Riedel, p. 308. Agarwal and Lang, p. 641. Agarwal and Lang, p. 646. Irwin, pp. 217–220. Agarwal and Lang, p. 656. Nilsson and Riedel, pp. 287–288...
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