E-commerce Inventory Management: Preventing Stockouts and Overstocking

Inventory management is the invisible foundation of e-commerce. Get it right and orders flow smoothly. Get it wrong and you either lose sales to stockouts or lose money to unsold inventory.

Inventory Management Fundamentals

ABC Analysis

Categorize products by revenue contribution:

• A items (20% of products, 80% of revenue): Monitor daily. Never run out. Keep generous safety stock.
• B items (30% of products, 15% of revenue): Monitor weekly. Keep moderate safety stock.
• C items (50% of products, 5% of revenue): Monitor monthly. Keep minimal stock or dropship.

Reorder Points

Set automatic reorder alerts for each product based on sales velocity and supplier lead time. Formula: Reorder Point = (Average Daily Sales x Lead Time) + Safety Stock.

Safety Stock

Extra inventory to cover demand spikes and supply delays. For A items, keep 2-4 weeks of safety stock. For B items, 1-2 weeks. For C items, minimal or none.

Multi-Channel Inventory

If you sell on your website, Amazon, and eBay, inventory must sync across all channels in real-time. Overselling (selling the same item twice) destroys customer trust. Use a centralized inventory system that updates all channels simultaneously.

Seasonal Planning

Review last year sales data to predict seasonal demand. Order holiday inventory 8-12 weeks in advance. Plan clearance strategies for post-season inventory. Michigan businesses should account for weather-related demand patterns.

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