Tanjil Ahmed
Shopify Developer, Devmerx
Tanjil Ahmed writes about Shopify inventory operations for Devmerx, the studio behind StockCue: Inventory Forecast.
27 articles on the Devmerx blog
Articles by Tanjil Ahmed
How to Manage Multiple Suppliers
Every extra supplier adds a lead time, a minimum and a calendar. How to assign SKUs, batch orders sensibly, and keep a backup that actually works.
GMROI Explained
Turnover says how fast stock moves; GMROI says whether the movement was worth it. The formula, worked by category, and the trap of reading it on one SKU.
Stocky Replacement: What to Look For
A vendor-neutral requirements list for scoring any Stocky replacement: the three jobs it did, what to verify before installing, and what migration costs.
Inventory Planner Alternatives for Shopify
Most merchants searching for an Inventory Planner alternative are paying for depth they don't use. What to compare, and when staying is the right call.
Spreadsheet vs. Inventory Planning Software
An honest comparison including the case for staying: what a spreadsheet does well, what it can't do at all, and the switching cost nobody quotes.
Why Best Sellers Keep Going Out of Stock
Your best seller runs out because its sales rate outgrew the numbers you planned it with. The four mechanisms behind it, in the order they usually bite.
10 Ways to Sell Excess Inventory Without Losing Margin
Ten tactics for clearing excess stock, ordered from most margin-preserving to most drastic.
Shopify Inventory Best Practices Checklist
Eighteen self-audit checks for Shopify inventory (sales-velocity forecasting, KPI tracking, stock counts, and discrepancy prevention), each linking out to the full guide.
How to Calculate Excess Inventory
Excess is a number, not a feeling. The formula for how many units too many you're holding, worked on one SKU.
How to Identify Slow-Moving Inventory
No alert fires for a slow mover. Which metrics flag one, how to set your threshold, and when to stop reordering it.
How to Calculate What Stockouts Cost Your Store
Industry stockout figures don't apply to your store. The calculation that does, worked on your own margin and velocity.
10 Warning Signs You're About to Run Out of Stock
The signals that appear before a stockout, most of which nothing in Shopify will point out to you.
Manage Inventory Across Multiple Shopify Locations
Setting up locations, per-location stock, transfers, and fulfillment priority in Shopify, plus what dedicated apps do and don't yet automate per location.
What to Do When a Product Goes Out of Stock
The product is already at zero. What to do in the next hour, the next day, and before the replacement lands.
Purchase Order Workflow: Reorder to Receiving
The full sequence from a crossed reorder point to received stock, and the three places it most often breaks down.
What Is Shopify Inventory Management?
Shopify's inventory vocabulary explained for merchants who've never managed stock anywhere: SKUs, variants, locations, tracking, and when native tools stop being enough.
Purchase Orders vs. Inventory Transfers
Buying from a supplier and moving stock you already own fix two different shortages. A quick test for which you need.
Common Inventory Forecasting Mistakes
A scannable checklist of the mistakes that quietly wreck a forecast, including the stockout bias almost nobody has a name for.
How to Improve Forecast Accuracy
MAE, MAPE and forecast bias in plain English, plus the caveat vendor content leaves out: MAPE breaks down on low-volume SKUs.
Shopify Purchase Orders: Complete Guide
Shopify's native purchase order tool end to end: what it covers, where its two-status lifecycle stops, and what an app adds.
Automatic vs. Manual Inventory Reordering
Manual works fine below a certain catalogue size. An honest look at where the line actually sits, and what breaks past it.
Min/Max Inventory Planning Explained
Older ERP vocabulary mapped onto formulas you already have: min is your reorder point, max is your target stock level.
Moving Average Forecasting Explained
Simple vs. weighted, worked on real sales numbers: the window-size tradeoff, and exactly where the method stops being reliable.
Reorder Quantity: How Much Stock to Order
How many units to order once you hit your reorder point, and what happens when the supplier's minimum doesn't match that number.
How to Track Your Brand Mentions in ChatGPT, Gemini & Perplexity
AI search engines answer shopping questions without sending clicks. Here's how to measure your brand's visibility before your competitors do.
The Complete Shopify SEO Guide for 2026
A complete Shopify SEO guide covering technical foundations, keyword research, product page optimization, and link building for DTC brands wanting more organic traffic.
How to Protect Your Shopify Product Images from Theft (2026 Guide)
Image theft costs Shopify stores sales, SEO, and brand authority. This guide reveals what actually works to stop it, from server-level protection to automated monitoring.
