Inventory management techniques are the different methods you can use to organize, track, and control your stock. These range from straightforward approaches like First-In, First-Out (FIFO) to more complex systems like Just-In-Time (JIT). The goal is always the same: find that balance between holding costs, meeting customer demand, and maximizing your profit.

A 3PL (third-party logistics) provider is a partner you hire to manage the physical side of your ecommerce business, including warehousing, inventory management, and order fulfillment. Partnering with a 3PL allows you to offload daily operations so you can focus on growing your brand.

The inventory turnover ratio in days measures how long your stock sits before it sells. The formula is straightforward: divide 365 by your inventory turnover ratio. For ecommerce sellers on marketplaces like Shopee, Lazada, and TikTok Shop, this metric is critical — a low number means products move fast and cash flows freely, while a high number signals capital trapped in slow-moving goods.

An Advanced Shipping Notification (ASN) is a digital heads-up from your supplier. It details exactly what’s in a shipment, the precise quantities, and when it’s scheduled to arrive. Think of it as a detailed tracking update for an entire B2B shipment, giving you the complete picture before the delivery truck even pulls up.

The 3PL vs 4PL conversation comes down to a simple question: are you looking for a partner to do the logistical work, or a partner to manage the entire process? A 3PL is your hands-on crew, physically handling warehousing and shipping. A 4PL acts as the general contractor for your supply chain, managing all the different players (including 3PLs) to ensure the entire system works together seamlessly.

Inventory turnover days is a metric that tells you, on average, how many days it takes for your business to sell its entire stock.

Think of it like the fresh ingredients in a restaurant’s kitchen. Inventory turnover days shows how quickly you use up all those ingredients to serve dishes before needing to restock.