Stopping orders falling between Shopify and the warehouse
Orders came in through Shopify and got picked up by a third-party logistics provider via CSV exports twice a day, at 10am and 4pm. Anything placed outside those two windows waited. Returns processed at the warehouse were not reflected in Shopify stock for 24 to 48 hours, which routinely caused oversells on popular SKUs. Customer service heard about every issue first, then ops found out second.
What was getting in the way
Orders came in through Shopify and got picked up by a third-party logistics provider via CSV exports twice a day, at 10am and 4pm. Anything placed outside those two windows waited. Returns processed at the warehouse were not reflected in Shopify stock for 24 to 48 hours, which routinely caused oversells on popular SKUs. Customer service heard about every issue first, then ops found out second.
How we shaped the fix
We replaced the twice-daily CSV with a webhook-driven feed. Each Shopify order now pushes to the warehouse management system within 60 seconds and is acknowledged back. Returns processed at the warehouse trigger a stock update in Shopify within five minutes. An exception dashboard flags any order that has not been acknowledged inside ten minutes, which lands as a Slack message to the ops manager. The warehouse software stayed. Shopify stayed. The two now talk to each other in seconds rather than hours.
What changed
Oversells dropped 92% in the first month. Average time from order to warehouse acknowledgement is 47 seconds, against six hours before. Customer service is no longer the early warning system for ops problems. Returns processing time is unchanged, but the downstream visibility is fixed.
What we did not change
The 3PL stayed. Shopify stayed. The warehouse staff did not learn a new tool. The picking-and-packing process is unchanged. What changed is the silent middle layer that used to be a twice-daily CSV upload and is now a steady, two-way conversation between systems that the brand was already paying for.
The numbers
- 92% drop in oversells in the first month
- 47 seconds average order-to-warehouse handoff (from 6 hours)
- 5-minute stock update window for returns (from 24 to 48 hours)
- 2 warehouses, one synchronised view
What this would look like in your business
Any brand running a meaningful share of orders through Shopify and outsourcing fulfilment has a version of this seam. The bigger the catalogue and the faster the SKUs move, the more it costs. The fix is rarely a different warehouse partner, it is the wiring between the two systems already in place. If you can name the lag in hours, you have a fixable problem.
What this shipped back to ops.
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