The decisions about how to manage the policies and decision rules related to inventory levels are considered:

turnover

Explanation:

The turnover in any business is defined a the revenue it earns by comparing to its assets that it uses to to run the business.

The turnover is mostly used to compare the performance of the firm with other firms in the same industry and is also used to monitor  the effect of change in the inventory decision rules.

The company's vision is also important when the decision about managing the policies as well as decision rules which are related to the inventory level.

income statement is prepared in order to show the profits and loss of a business. in order to prepare the income statement she should collect all the income and expenses of the product with the cost of production.