One of the most common sources of frustration in a new sourcing relationship isn't quality or price, it's a timeline that was unrealistic from the start. Understanding what each stage actually takes helps set expectations that hold up once production begins.
Initial sampling is rarely a single round
A first sample is a starting point for discussion, not a finished product, and most sourcing projects go through two to four rounds of revisions before a sample is approved for production. Each round typically takes one to three weeks depending on the complexity of the product and how far the factory is from existing capability, so budgeting for a single round is the most common way a timeline goes wrong before production has even started.
The gap between sample approval and production start
Once a sample is approved, there's usually a gap before mass production actually begins, covering material procurement, especially for anything not already in the factory's regular inventory, and production scheduling around the factory's existing order book. This gap is easy to underestimate because it doesn't involve visible physical progress, but it's often where an unrealistic timeline first becomes apparent.
Production time scales with complexity, not just volume
A larger order doesn't necessarily take proportionally longer if a factory has the capacity to run it, but a more complex product, more components, more finishing steps, more quality checkpoints, extends timelines regardless of order size. Comparing lead times across different factories or products by volume alone tends to miss this.
Quality inspection and rework need their own buffer
A realistic timeline includes time for quality inspection before shipment and, if issues are found, time for rework or partial re-production. Building a timeline that assumes the first production run passes inspection without exception, and leaves no room for it not to, is one of the more common planning mistakes in a first sourcing relationship.
Shipping time is often underestimated relative to production time
For businesses used to domestic sourcing, the shipping component, whether by sea or air, can end up being a larger share of total lead time than expected, particularly for sea freight where port congestion and customs clearance add variability on top of transit time itself. Treating shipping as a fixed, predictable number rather than a range with some built-in buffer is a common source of missed launch dates.