Avoid Stock Shortages With Better Supplier Management
Tired of empty shelves during peak season? Learn how to choose and manage suppliers to prevent stock shortages before they happen.
Why Do You Keep Running Out of Stock During Your Busiest Weeks?
Sales are climbing, foot traffic is up, and then the exact item customers want most is out of stock. Peak-season shortages don't usually happen because demand was unpredictable. They happen because the supplier relationship wasn't built to handle demand spikes in the first place.
Stock shortages are often treated as an inventory planning problem, but the root cause frequently sits further upstream, in how suppliers are selected and managed.
Why Good Inventory Planning Still Fails Without the Right Suppliers
You can forecast demand perfectly and still run out of stock if your supplier can't scale production or shipping fast enough to meet that forecast. Inventory planning assumes the supply side will cooperate. When it doesn't, the plan breaks regardless of how accurate the demand numbers were.
Questions to Ask a Supplier Before You Depend on Them for Peak Season
What is their maximum production capacity per month, and how close are they currently running to that ceiling
Do they have a documented process for prioritizing existing customers during a demand surge, or does it become first-come-first-served
What is their actual historical on-time delivery rate, not just their quoted lead time
Do they hold any safety stock of raw materials, or are they also dependent on their own upstream suppliers with no buffer
A Seasonal Example From the Vietnamese Market
Consider a supermarket chain that sees a predictable spike in cleaning product demand in the weeks before Tet, when households do a deep clean before the new year. A supplier who normally delivers within 2 weeks might stretch to 5 or 6 weeks during this period if every other retail customer is placing the same seasonal order simultaneously. A buyer who only discovers this bottleneck in December, when the order is placed, has already lost the window to react. A buyer who confirmed the supplier's peak-season capacity back in October can place an early order or secure a guaranteed allocation instead.
Building a Supplier Base That Can Handle Demand Spikes
Avoid relying on a single supplier for any high-volume, high-turnover product category
Qualify at least one backup supplier per core category, even if you rarely use them, so the relationship and approval process is already in place when needed
Ask suppliers directly how they handle demand spikes and compare their answers against actual performance during your last peak season
Signs a Supplier Relationship Is at Risk of Causing a Shortage
Delivery times have been creeping up gradually over several orders without explanation
The supplier has gone from proactive communication to reactive, only responding when you chase them
You've noticed quality or packaging changes that suggest cost-cutting on their end
They've mentioned losing a major customer or supplier of their own, which could signal instability
How Far in Advance Should You Plan for Known Peak Periods?
For predictable annual peaks like Tet or back-to-school season, confirm supplier capacity and place initial orders at least 8 to 10 weeks ahead
For less predictable spikes, such as a sudden viral product trend, maintain a slightly higher standing safety stock on fast-moving categories rather than trying to time the market
Review your peak-season performance after the fact each year, and adjust your supplier lead times and order timing based on what actually happened, not just what was planned
Communicating With Suppliers Before Peak Demand Hits
Share your forecasted order volume with key suppliers ahead of time, rather than surprising them with a large order at the last moment
Ask suppliers to flag early if they anticipate capacity constraints, so you have time to source a backup
Formalize peak-season expectations in writing where possible, even a simple email confirmation of expected volume and delivery windows
If recurring stock shortages are costing you sales during your busiest periods, our team can help you review your current supplier relationships and build a plan that holds up when demand actually spikes.