Supplier management
Supplier management is the ongoing process of managing and developing supplier relationships to ensure reliable deliveries, consistent quality, and compliance with agreed terms. It covers everything from lead time and quality to communication and following up on whether a supplier delivers what was promised. When suppliers are unreliable, companies often compensate by holding additional inventory.
What does supplier management actually cover?
In practice, supplier management is about far more than placing an order. You need to continuously track whether the supplier delivers on time, whether quality stays consistent, whether the day-to-day collaboration works, and how vulnerable your business really is if the supplier falls short.
It matters most when you're dealing with long lead times, many suppliers, complex product ranges, or heavy reliance on a small number of critical suppliers.
How do you measure whether a supplier is actually performing?
Supplier problems often become visible only after delays or quality issues have already affected inventory, production, or customers.
That's why it makes sense to monitor supplier performance continuously. Relevant metrics include on-time, in-full delivery (OTIF), actual lead times from order to receipt and their variability, errors per delivery, and supplier response times when problems occur. The point isn't to measure every supplier with the same rigor – it's to focus follow-up on supplier performance where the risk and the stakes are biggest.
Why can poor supplier management lead to higher inventory costs?
Many companies hold extra inventory as a buffer against unreliable deliveries. If a supplier is unstable, extra stock gets built up "just in case." The problem is that this stock then starts absorbing uncertainty that actually belongs somewhere else in the value chain – and that can lead to larger safety stock and more capital tied up in inventory.
Supplier management is therefore not just about the relationship with the supplier. It's just as much about preventing that uncertainty from turning into extra inventory in your own business.