Factory SLAs: how to enforce on-time, in-full deliveries
Quick answer: A factory SLA only works if it has real financial teeth. That means defining On-Time, In-Full (OTIF) precisely, tying a daily penalty to the final invoice, and setting a clear, excuse-proof start date for the production clock. Without those three pieces, a "delivery agreement" is really just a polite request.
Factories routinely stretch the truth on lead times to win business. Once the deposit's in, production sometimes quietly slides behind larger retail orders that pay more or shout louder.
When goods arrive late, you run out of stock and lose revenue that doesn't come back. A polite email or a handshake agreement won't fix that. What actually works is a Service Level Agreement with financial consequences built in, not implied. Here's how to write one that a factory actually has to take seriously.
The OTIF standard
On-Time, In-Full is really the only metric that matters in manufacturing. Anything less than both isn't a partial win; it's a failure.
Arriving on time with half the requested units is a failure. Arriving in full but two weeks past the deadline is also a failure, even if it feels less dramatic. An SLA needs to state explicitly that an order counts as fulfilled only when 100% of units pass a third-party quality inspection by the exact agreed date, not "around" that date.
Tie penalties directly to the invoice
Vague threats about taking your business elsewhere rarely change behavior. The penalty has to be financial, automatic, and actually felt.
Write a clause that deducts a set percentage from the final invoice for every day a shipment runs late. A common starting point is 1 to 2% per day, capped around 15%. This only works if you're not paying 100% upfront. Hold the balance until goods pass inspection, and you've got the leverage to deduct the penalty before the final wire transfer ever goes out.
Define the starting line
When a delay happens, factories tend to reach for the same excuses fast: raw material shortages, a local power outage, something outside their control.
An SLA needs to define exactly when the production clock starts, closing off that excuse before it can be used. State plainly that lead time begins the day the factory receives the initial deposit, and require them to secure raw materials before the agreement is even signed, not after.
Enforce strict SLAs with A2Z Supply Chain
Arguing with an overseas supplier over late fees drains time and energy a founder doesn't have to spare. A2Z Supply Chain manages the contracts and enforces the terms directly.
Supplier coordination: We draft and negotiate enforceable OTIF clauses directly with your overseas factories.
Logistics: We track daily manufacturing progress, so delays get spotted weeks before the penalty phase even triggers.
Financial modeling: We calculate exactly what a delay costs and enforce invoice deductions on your behalf.
Inventory planning: We build precise safety buffers into your supply chain while still holding factories accountable.
Round-the-clock support: Our ops pod operates 24/7 on Slack to hold suppliers to their exact deadlines across time zones.
A contract without teeth is just a preference. A well-written SLA is what turns a promised delivery date into one that actually shows up on time.