Economic Replacement of a Heterogeneous Herd
为异质生长的猪群开发了最优屠宰体重模型，发现分批销售策略能避免重猪的等级损失，但仅适度延长育肥期，设施机会成本主导了替代决策。
A model was developed to determine the optimal slaughter weights of pigs with heterogeneous growth raised in a 1,000 head barn and marketed in truckload groups. Under commonly used revenue schemes, which include discounts for weight and leanness, the optimal strategy was to market one or two truckloads of the heaviest animals, to wait several days, and then to market the rest of the herd. This multiple marketing strategy allows the producer to avoid some sort losses for heavy animals, but only modestly extends the grow/finish period, reflecting the dominance of the opportunity cost of facilities in the herd replacement decision.