The economic order quantity represents the lot size that balances two opposing inventory-cost components: ordering cost and holding cost. Ordering larger quantities reduces the number of replenishment orders placed during a period, thereby lowering annual ordering cost. However, larger quantities increase average cycle inventory and therefore increase annual holding cost. Ordering smaller quantities produces the reverse effect.

At the EOQ, the combined annual ordering and holding cost reaches its minimum. A significant managerial characteristic of the EOQ cost curve is that it is comparatively flat near this minimum. Consequently, modest deviations above or below the mathematically optimal order quantity generally produce only a small increase in total relevant cost. This is why total ordering and holding costs are described as relatively stable around the economic order quantity .

This property is operationally useful because managers do not normally need to implement the calculated EOQ with absolute numerical precision. Practical constraints such as case-pack quantities, pallet sizes, supplier minimums, transportation capacity, and scheduling considerations can justify a nearby quantity without materially damaging cost performance.

Therefore, option B accurately describes the behavior of total ordering and holding cost near EOQ.

Reference Topic: Inventory and Warehousing — EOQ, Ordering Cost, Holding Cost, and Lot-Sizing Trade-offs.

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