To control whether a project stock is managed as valuated or non-valuated project stock, you have to maintain the setting in the material master. The material master is a set of data that defines the characteristics and properties of a material that can be produced or procured. The material master contains various views that store different types of information about a material, such as basic data, sales data, purchasing data, accounting data, and so on. In the accounting view of the material master, you can specify whether a material is relevant for valuated project stock or not by using the Valuation category field. The valuation category is a parameter that determines how a material is valuated in different stock accounts. If you select Q as the valuation category for a material, it means that the material is relevant for valuated project stock and its value is updated in Financial Accounting. If you leave the valuation category blank for a material, it means that the material is relevant for non-valuated project stock and its value is not updated in Financial Accounting. Reference: https://help.sap.com/doc/0f069b2e08b748f1b480d4c8b46c3c49/100/en-US/6a7a9f0a6e421014e10000000a174cb4.html