Six-Tenths Factor Aids in Approximating Costs¶
Williams, Jr., R. (1947). Six-Tenths Factor Aids in Approximating Costs. Chemical Engineering.
Cited by¶
1 citation across 1 artifact.
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Primes¶
- Economies of Scale
- The engineering literature formalized the empirical cost-scaling relationship for process industries as the six-tenths rule: \(C_2 / C_1 = (Q_2 / Q_1)^{0.6}\),
This sourceCanonical sources: Williams, Robert, Jr. (1947). "Six-tenths Factor Aids in Approximating Costs." Chemical Engineering, vol. 54 (December), 124–125; and Peters, Max S., Klaus D. Timmerhaus, & Ronald E. West. (2003). Plant Design and Economics for Chemical Engineers, 5th ed. New York: McGraw-Hill (capital-investment estimation chapter). Empirical regressions place the exponent in the 0.3–1.0 range, averaging ≈0.6, depending on equipment class; supports the inline 'six-tenths rule' claim. No DOI/authoritative URL exists for the 1947 trade-magazine note; left link-less per policy.
- The engineering literature formalized the empirical cost-scaling relationship for process industries as the six-tenths rule: \(C_2 / C_1 = (Q_2 / Q_1)^{0.6}\),
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