Pick, Pack, Ship — Fulfillment Workflow for Shopify

Inventory errors cost Shopify merchants in two directions simultaneously — stockouts lose sales while dead stock drains cash. Getting inventory management right transforms your operation from reactive to proactive. This guide covers pick, pack, ship — fulfillment workflow for shopify with practical systems you can implement today.

The Real Cost of Poor Inventory Management

• Stockouts: You lose the sale to a competitor. Research shows 43% of stockout shoppers never return.
• Overstock: Capital tied up in slow-moving inventory that depreciates, takes warehouse space, and may expire or go out of trend
• Inventory inaccuracies: Selling products you do not have generates orders you cannot fulfill — leading to refunds, negative reviews, and potentially account issues

Shopify Inventory Basics

Set up the foundation correctly in Shopify Admin:

1. Enable “Track quantity” on every product in the Inventory section
2. Set accurate opening stock quantities — inaccurate starting counts compound into bigger errors
3. Configure locations correctly (Settings → Locations) — each warehouse or store should be a separate location
4. Decide per product whether to “Continue selling when out of stock” (for pre-orders) or block sales
5. Set up low inventory alerts in Settings → Notifications

Key Inventory Metrics

• Sell-through rate: Units sold / Units received × 100. Target 70-80% for fashion, 80-90% for fast-moving consumer goods
• Days of inventory on hand: Current stock / Daily sales rate. Should cover your supplier lead time plus safety stock
• Inventory turnover: COGS / Average inventory value. Target 4-8x annually for most product categories
• Reorder point: The stock level at which you place a new purchase order = (average daily sales × lead time days) + safety stock

Safety Stock Formula

Safety stock prevents stockouts when demand spikes or suppliers are delayed:

Safety Stock = (Max daily sales - Average daily sales) x Maximum lead time days

Example:
Average daily sales: 10 units
Maximum daily sales: 18 units
Supplier maximum lead time: 14 days

Safety Stock = (18 - 10) x 14 = 112 units

Inventory Management Apps for Shopify

• Inventory Planner: Best demand forecasting, automatically recommends reorder quantities and timing — pays for itself in reduced stockouts and overstock
• Cin7: Full-featured with warehouse management, B2B, multi-channel sync, manufacturing — for complex operations
• Linnworks: Enterprise multichannel inventory — great for stores selling on Shopify + Amazon + eBay simultaneously
• DEAR Inventory: Good mid-market option with manufacturing support and strong Shopify integration

ABC Analysis for Pick, Pack, Ship — Fulfillment Workflow for Shopify

Prioritise your inventory management attention using ABC classification:

• A items: Top 20% of products that generate 80% of revenue — monitor daily, keep highest safety stock, never let these stock out
• B items: Next 30% — monitor weekly, maintain moderate safety stock
• C items: Remaining 50% — monitor monthly, minimal safety stock, consider discontinuing slowest movers

Focus your reorder attention and safety stock budget heavily on A items — a stockout on your top seller costs dramatically more than a stockout on a slow-moving SKU.