The production plan relates to a firm's financial planning because it is used to:

The production plan relates to a firm’s financial planning because it is used to identify future cash needs. The production plan is a plan that specifies the quantity and timing of production for each product or product family. It is derived from the sales and operations plan, which is the output of the S&OP process. The production plan affects the firm’s financial planning because it determines the amount of cash that is needed to purchase materials, pay labor, and cover overhead costs. The production plan also affects the amount of cash that is generated from sales, as it influences the delivery time and customer service level. Therefore, the production plan helps to forecast the cash inflows and outflows, and to plan for the financing and investing activities of the firm. The other statements are not true about the production plan. The production plan does not calculate standard product costs, as standard product costs are predetermined costs that are based on the expected inputs and outputs of production. The production plan does not determine variable costs, as variable costs are costs that vary with the level of production. The production plan does not project payroll costs, as payroll costs are part of the labor budget, which is derived from the production budget. References: Production Plan | APICS Dictionary Term of the Day, APICS CPIM 8 Planning and Inventory Management | ASCM