When a Reorder Calendar Still Assumes Pre-Diversion Transit Times
Cape of Good Hope routings add roughly ten to fourteen days to Asia to Europe transit, and a reorder calendar built on Suez timings quietly runs stock out.
Representative scenario, not a specific client engagement. This page describes how a shipment of this kind is genuinely handled — the constraints, the approach, and where it commonly goes wrong. It does not name or describe a real Transeasy customer. Our two documented project moves are the Mexico container move and the India overweight cargo delivery.
The situation
An importer buying full containers from South China into North Europe sets its planning parameters once: supplier lead time, transit time, safety stock, reorder point. Those numbers were usually fixed when Asia to Europe sailings ran through the Suez Canal. Since carriers began routing around the Cape of Good Hope, the sea leg on that lane is materially longer, but the reorder point in the planning system often is not.
The failure is quiet. On paper the stock cover still reads as adequate, because the calculation is running on a transit figure that no longer exists. The gap appears late, usually when a sailing slips by a few days on top of the longer routing and there is no buffer left to absorb it. The remedy at that point is airfreight, which is available, expensive and entirely avoidable.
What made it difficult
- Schedule reliability on the Asia to Europe trade has sat well below pre-diversion norms, so a single published ETA is a forecast rather than a commitment.
- Cape routings add sea distance and bunker consumption, which shows up both in base rates and in surcharges that move on their own timetable.
- Purchase order cycles, minimum order quantities and supplier lead times are usually contractual, so they cannot be recut at short notice to absorb a longer transit.
- Airfreight substitution is always available but changes landed cost per unit enough to remove the margin on low-value goods entirely.
How it is approached
The first step is to re-baseline the number the planner is actually using. Port-to-port sailing time is not the figure that governs a reorder point; door-to-door is. Rebuild the lane leg by leg: cargo ready to gate-in cut-off, cut-off to sailing, sailing to discharge, discharge to customs release, release to delivered. Each leg gets a realistic range rather than a best case.
Those ranges then become a policy rather than an estimate. Safety stock should be set against a high percentile of the door-to-door distribution, not its average, because an average transit protects roughly half of shipments. Where the variance sits matters as much as its size: variance at discharge and inland is usually cheaper to buffer at the destination warehouse than variance at origin.
Structural changes reduce the variance rather than paying for it. Splitting a monthly quantity across two sailings halves the exposure to any one vessel. Direct services without transhipment remove a handling point where delay compounds. For Central and Eastern European destinations, China to Europe rail runs on a different geography entirely and can carry a portion of the volume as a hedge rather than a replacement.
Finally, the parameters need an owner and a review date. Transit assumptions should be re-derived from actual arrival data each quarter, exceptions reported against the planned milestone rather than the original ETA, and the reorder point adjusted when the evidence moves. The version that fails is the one set once and left in the system.
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Takeaways
- A transit time is a distribution rather than a single number, and stock policy should be set against its upper end.
- A re-routing changes planning parameters more than it changes the freight rate, and the planning damage is usually the larger of the two.
- Splitting volume across sailings and across modes buys resilience more cheaply than raising safety stock on every line.
- Any transit assumption held in a planning system needs a scheduled review date, or it ages silently until it fails.
Frequently asked
Routing Asia to North Europe around southern Africa rather than through Suez adds a substantial amount of sea distance, and the usual indicative figure is roughly ten to fourteen extra days of sailing time. The practical effect is larger than that, because schedule reliability falls and knock-on delays at transhipment and discharge add further days. Plan against a range, not a point.
Rarely as a wholesale replacement. China to Europe rail follows an entirely different geography and typically offers a transit between sea and air for suitable commodities, which makes it a useful hedge for part of a volume rather than all of it. Air freight suits a small pipeline of high-value or urgent lines. The usual answer is a mode mix.
Measure door-to-door rather than port-to-port, collect the actual results for at least the last several months, and set safety stock against a high percentile of that distribution rather than the average. Review the figure quarterly against new arrival data. A reorder point derived from an average protects roughly half of shipments, which is not a service level.