Storing goods in a bonded warehouse and releasing them as needed is the most appropriate course of action for a firm wanting to delay paying duty on parts until they are required for manufacturing. Bonded warehouses allow the storage of imported goods without paying duty until the goods are withdrawn for use or sale. This approach can improve cash flow and provide flexibility in managing inventory and duty payments.

References:

U.S. Customs and Border Protection. (2021). Bonded Warehouses.

Burt, D. N., Dobler, D. W., & Starling, S. L. (2003). World Class Supply Management.