手法を比較

	レーンのカットオフグレードモデル	擬似フローアルゴリズム
分野	鉱山工学	鉱山工学
系統	Process / pipeline	Process / pipeline
提唱年	1988	1992
提唱者	K. F. Lane	Dorit S. Hochbaum
種類	Economic optimization framework for ore classification	Efficient algorithm for maximum closure problem
原典	Lane, K. F. (1988). The economic definition of ore: cutoff grades in theory and practice. Mining Journal Books, London.	Hochbaum, D. S. (1992). A new-old algorithm for minimum-cut and maximum-flow problems. Journal of the ACM, 1(1), 76-109.
別名	Lane Model, Cut-off Grade Optimization, Lane's Optimization Model	Pseudoflow Algorithm, Hochbaum Algorithm
関連	3	3
概要	Lane's Cut-off Grade Model, developed by Kenneth F. Lane and formalized in his 1988 book, provides a rigorous economic framework for determining the minimum grade at which ore should be mined and processed. It accounts for variable mining costs, metallurgical recovery, and commodity prices to optimize profit per unit processed. The model is foundational in mining economics and underpins daily operational decisions at thousands of mines worldwide.	The Pseudoflow Algorithm, developed by Dorit Hochbaum in 1992, is a polynomial-time algorithm for computing maximum weighted closures in directed acyclic graphs. In mining, it solves the ultimate pit limit problem more efficiently than earlier methods. By maintaining feasible pseudoflows and iteratively eliminating negative-cost nodes, it achieves near-optimal practical performance even on industrial-scale block models.