Inventory Obsolescence & Mark Out of Stock A Mark Out of Stock (MOS) is a reduction of value for items that have been deemed nonsaleable or nonusable. The quality of goods for sale/production is assessed on a quarterly basis. The Inventory Clerk downloads the quarterly Inventory Aging Report from the ERP. The ERP ages inventory based on parameters setup in the ERP (R_INV_18); (C_INV_12). Based on inquiry with Operations & Sales Managers, the Inventory Clerk finalizes the Inventory Aging Report to determine whether a reserve is required. The inventory aging is reviewed by the Inventory Manager & Inventory Controller (R_INV_16); (R_INV_17); (C_INV_11). Once the quarterly inventory aging reports are approved, they are sent by the Inventory Controller to the Financial Clerk for recording to the ERP system, who then prepares an Inventory Obsolescence and MOS calculation based on the approved Inventory Aging Report. The