Summary
Highlights
Inventory is a list of items a company owns, including finished goods, raw materials, or products for sale. It can be categorized differently as it moves through the supply chain.
Inventory begins as raw material ordered from a supplier. Once shipped, it becomes transportation pipeline inventory. After raw materials are received and enter production, they transform into work-in-process inventory.
Once production is complete, work-in-process becomes finished goods, which are ready for sale. Other important types include replacement parts for machinery, supplies (materials used in production but not part of the final product), and safety stock.
Safety stock is extra inventory kept as a buffer to prevent stock-outs, which occur when inventory is depleted. Companies want to avoid stock-outs to prevent customers from going to competitors.
A key takeaway is that inventory is treated as cash. Companies do not want to tie up too much cash in inventory on shelves, as that money could be invested elsewhere to generate returns, like in a savings account.
Another reason for limiting inventory is capacity; companies need physical space (like warehouses) to store products, which incurs costs. Additionally, perishable items have a limited shelf life, and products like technology and fashion depreciate in value over time, making it unprofitable to hold excessive stock.
Companies consider demand and seasonality when managing inventory. While avoiding stock-outs is crucial to prevent losing customers to competitors (illustrated with an anecdote about a chicken restaurant running out of chicken), they must balance this with the risks of holding too much inventory.
In summary, inventory is essential for production and sales. Companies manage various types: raw material, work-in-process, finished goods, replacement parts, supplies, transportation pipeline inventory, and safety stock. It's crucial to remember that inventory represents cash, and companies use different models and systems to maintain accurate inventory levels without tying up excessive capital.