Ordering cost consists of costs associated with initiating and executing a replenishment order. Depending on the inventory model, these can include purchase-order administration, supplier communication, scheduling, shipment preparation, receiving activities, and fixed transportation expenses associated with each replenishment event. Among the listed alternatives, transportation cost is the appropriate ordering-cost component.
The key distinction is whether the cost is associated with placing or moving a replenishment order or with maintaining inventory after it has entered stock. Transportation often contains a fixed element that is incurred whenever an order or shipment is dispatched. This fixed component influences lot-size economics because ordering more frequently causes the supply chain to incur the transportation or replenishment charge more frequently.
Theft, security, and damage are primarily inventory-carrying or warehousing exposures. They arise because inventory is being stored, protected, and physically maintained rather than because an order is being initiated.
This distinction is fundamental to EOQ and cycle-inventory analysis. Ordering costs decrease as order quantities increase because fewer orders are required, while holding costs increase as average inventory rises. The accepted treatment of this exact supply-chain formulation identifies transportation cost as the ordering-cost answer.
Reference Topic: Inventory and Warehousing — Fixed Ordering Cost and EOQ Cost Components.
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