Trade-offs exist between carrying and stockout costs库存持有成本与缺货成本之间的权衡 Marginal analysis Determination of Safety Stock Level Number of Units Total Value of 25% Carrying Number of Additional of Safety Stock Safety Stock Annual Cost of Additional Stockout (S480 per Unit) Carrying Incremental Orders Cost afety stock Filled Avoided 10 $4800$1,200$1,200 20 $6,481.00 20 9.600 2.400 1.200 5,18480 30 14.400 36001,200 3.88860 9.200 4.800 1.200 50 24,000 6.000 1.200 28.800 7200 1.200 628643 2.592.40 1.944.30 1,29620 70 33.600 8400 1,200 972.159-16 Trade-offs exist between carrying and stockout costs 库存持有成本与缺货成本之间的权衡 – Marginal analysis Number of Units of Safety Stock Total Value of Safety Stock ($480 per Unit) 25% Annual Carrying Cost Carrying Cost of Incremental Safety Stock Number of Additional Orders Filled Additional Stockout Costs Avoided 10 $4,800 $1,200 $1,200 20 $6,481.00 20 9,600 2,400 1,200 16 5,184.80 30 14,400 3,600 1,200 12 3,888.60 40 19,200 4,800 1,200 8 2,592.40 50 24,000 6,000 1,200 6 1,944.30 60 28,800 7,200 1,200 4 1,296.20 70 33,600 8,400 1,200 3 972.15 Determination of Safety Stock Level