A company could utilize the economic order quantity model to determine __________.

The economic order quantity (EOQ) model is designed to help businesses determine the optimal order quantity that minimizes total inventory costs, including ordering costs and holding costs. This model calculates the ideal number of units to order each time a purchase is made, leading to reduced expenses associated with excess inventory and frequent reordering.

By using the EOQ model, companies can pinpoint the most cost-effective quantity to order, thus ensuring they maintain sufficient inventory without overstocking or facing stockouts. This helps streamline inventory management and keeps operational costs in check.

While the other options presented may have their own significance in operations management, they do not directly relate to the primary function of the EOQ model. For example, determining the timing of orders may require additional analysis beyond what the EOQ provides, such as lead time and demand variability. Similarly, the quality of materials and the choice of supplier involve criteria that extend beyond simple quantity calculations, focusing instead on supplier reliability and material standards. Hence, the EOQ's specific emphasis on quantity makes the second choice the most accurate response.