Read this chapter on Inventory Management. Be sure to reference the useful glossary terms at the bottom of each section. The language of inventory management can sometimes be confusing. This reading helps you to better understand how to reference inventory principles and use language appropriately.
Differentiate the different types of inventory based on it stage of proudction
Most manufacturing organizations usually divide their inventory into raw materials, work in process, finished goods, and goods for sales. A good purchased as a "raw material" goes into the manufacture of a product. A good only partially completed during the manufacturing process is called "work in process". When the good is completed as to manufacturing but not yet sold or distributed to the end-user, it is called a "finished good".
Manufacturing process: From raw materials to work in process to finished goods.
1. Raw materials: Materials and components scheduled for use in making a product.
2. Work in process, WIP: Materials and components that have began their transformation to finished goods. These items are not yet completed but either just being fabricated or waiting in a queue for further processing or in a buffer storage. The term is used in production and supply chain management. Optimal production management aims to minimize work in process. Work in process requires storage space, represents bound capital not available for investment, and carries an inherent risk of earlier expiration of shelf life of the products. A queue leading to a production step shows that the step is well buffered for shortage in supplies from preceding steps, but may also indicate insufficient capacity to process the output from these preceding steps. Just-in-time (acronym: JIT) production is a concept to reduce work in process with respect to a continuous configuration of product. Sometimes, outside of a production and construction context "work in process" is used erroneously where the status "work in progress" would be correctly used to describe more broadly work that is not yet a final product.
3. Finished goods: Goods ready for sale to customers. Finished goods is a relative term. In a supply chain management flow; the finished goods of a supplier can constitute the raw material of a buyer.
4. Goods for resale: Returned goods that are salable.
Source: Lumen Learning, https://courses.lumenlearning.com/boundless-finance/chapter/inventory-management/
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