How Often Should You Restock a Vending Machine?
A machine can look half full while its best-selling drink has been unavailable for two days. That is why the overall percentage of stock remaining is a poor way to decide when to restock. The useful question is which selection will run out first, and whether an earlier visit is worth the trip.
There is no single correct weekly schedule for every location. An office with five trading days, a round-the-clock workplace and a seasonal visitor attraction produce different patterns. Begin with a cautious schedule, measure what actually sells and adjust the plan after you have enough representative trading days.
Calculate cover for each important selection
Record usable capacity and average daily unit sales for each lane or compartment. Divide the stock available by expected daily sales to estimate days of cover. Use the actual product pack size and tested loading arrangement; a brochure's maximum capacity may assume a different assortment.
For a simple hypothetical example, a lane holding 24 bottles and selling six per trading day has four days of cover when full. A visit after four days leaves no buffer for a busier day. Planning a visit earlier, increasing that product's allocation or reducing the time between routes may be necessary.
Do not treat this example as a sales forecast. A newly installed machine needs observation before its average becomes useful. Holidays, shift changes, promotions and stockouts can distort the numbers. Track the days a selection was available; low recorded sales during an empty period do not mean low demand.
Let expiry dates limit the refill
Filling every space is not always the right decision. Fresh meals and other short-life products need a schedule that respects their remaining shelf life and required storage conditions. Buying and loading more stock will not solve a mismatch between demand and expiry.
Rotate by expiry date where appropriate, remove unsaleable items and record waste separately from sales. If products routinely expire before the next visit, reduce the loading quantity or rethink the assortment. Follow the product label and local food rules; a colder setting does not automatically extend the permitted selling life.
Build a visit trigger with travel time included
An alert at zero stock arrives too late. Choose a trigger that covers the delay between noticing the alert and reaching the site. Include time needed to pick stock, access the building and complete other route stops.
A location that allows servicing only during certain hours may need a larger buffer than an unrestricted one. Where remote stock reporting is available, check how recently the machine communicated before trusting the displayed balance. Maintain a fallback schedule for offline equipment rather than waiting indefinitely for a new alert.
Decide whether capacity or frequency should change
If one product runs out repeatedly while neighbouring lanes barely sell, reallocate space before adding another weekly trip. Check that the alternative configuration supports the product dimensions and dispenses reliably. Update selection labels and stock records after any change.
If most of the assortment sells quickly, a more frequent route or larger suitable machine may be justified. Compare the extra gross contribution with the added labour, travel, site access and equipment costs. Revenue alone can make an expensive service pattern look more attractive than it is.
Make every visit produce better data
- Count stock before adding products, including items trapped or unavailable for sale.
- Record units loaded, removed, wasted and used for testing.
- Check dates, cleanliness, pricing and a representative delivery test.
- Confirm that the dashboard balance matches the physical refill.
- Note unusual events that could explain a sudden change in demand.
A tidy refill record prevents the next operator from mistaking a counting error for a sales surge. Pre-packing stock for each site can help, but keep a modest allowance for discrepancies until inventory accuracy is established.
Review the pattern, not one busy day
Compare several service cycles and identify repeated empty selections, waste and unnecessary visits. Adjust one part of the plan at a time so you can see whether it helped. For a seasonal site, keep separate expectations for its busy and quiet periods.
When discussing a new vending machine, provide the supplier with product sizes, expected service access and assortment priorities. Ask for usable capacity with that exact mix. The right refill schedule starts with equipment that can hold and deliver the products customers actually buy.
