First Regular Shipment: How to Avoid Over-ordering

05.11.2026·7 min read·Delivery Pro China

The first regular shipment after a test purchase: how to calculate a safe volume, account for seasonality, and avoid tying up working capital. Read on dpc.pro.

In brief: The volume of the first regular shipment is calculated based on the actual sales rate from the test purchase, the length of the production and logistics cycle, and the safety stock. Jumping straight to maximum volume after a single successful test is a common mistake that leads to frozen working capital and warehouse losses.

Why a Test Shipment Does Not Reflect Real Demand

A test shipment serves several purposes at once: verifying the supplier, product quality, the logistics route, and the initial market response. However, it does not provide a reliable answer regarding sustainable demand.

There are several reasons for this. First, the test volume is small, and with limited supply the product sells faster than it would with a full assortment available. Second, the delivery date is random relative to the season: if the test fell during a peak period, the sales rate will be higher than the annual average. Third, you have not yet established a regular supply rhythm, and some customers may have bought extra stock out of fear of shortages.

All of this means that test data is a starting point for calculations, not a ready-made answer.

How to Calculate a Safe Volume for the First Regular Shipment

The process consists of three steps.

Step 1. Determine the average monthly sales rate. Take the number of units sold during the test period and divide by the number of weeks or months. If the product ran out before the end of the period, adjust accordingly: the actual rate is higher than recorded, because part of the demand went unmet.

Step 2. Multiply by the cycle length. Add the supplier's production lead time and the delivery time to your warehouse. This is how long a shipment is "in transit" and unavailable for sale. The shipment volume must cover sales during this period plus the safety stock.

Step 3. Add the safety stock. If demand is unstable or supplier delays are possible, add an extra 20–30% to the calculated figure. This is not "surplus" inventory – it is a buffer that protects against a sales stoppage.

The result of this calculation is the minimum sufficient volume for a regular shipment, not the maximum desirable one.

How Volume Affects Logistics and Unit Cost

As shipment size increases, not only the unit purchase price changes, but also the logistics structure.

Small volumes are shipped as consolidated freight: you pay for the space or weight actually used, and the shipment travels together with other clients' cargo. This is flexible, but the per-unit delivery cost is higher.

As volume grows, it becomes possible to fill a dedicated vehicle or container. The per-unit cost decreases, but the entry threshold in terms of volume and working capital increases. The transition between these formats is not always linear: sometimes a shipment ends up in a "grey zone" where it is already too large for a consolidated rate but not yet sufficient for cost-effective full use of a separate vehicle.

For this reason, when planning volume it is worth discussing with the supply operator in advance how a specific volume will fit into the logistics: which route will be used, how the cargo will be consolidated and packed at the warehouse in China.

Three Mistakes When Transitioning to Regular Procurement

Jumping straight to maximum volume. One successful test is weak statistical evidence. You do not know how sales will behave over three to six months, across different seasons, or at varying levels of shelf competition. Increasing volume several times in a single step freezes working capital and creates a risk of overstocking.

Ignoring seasonality. Demand across most product categories is uneven throughout the year. If the test shipment fell during a peak period, the next shipment of the same volume dispatched in a low season may sit in the warehouse considerably longer. Before calculating the regular volume, compare the test date against the seasonal calendar of your market.

Underestimating the working capital burden. A shipment twice the size of the test order means twice as much money frozen simultaneously: in payment to the supplier, in goods at the warehouse in China, in cargo in transit, and at customs. If your business cash cycle does not cover this total period, a cash gap arises before the goods even reach the sales floor.

How to Scale Volume Gradually

A practical approach: increase volume by 30–50% relative to the previous shipment every one to two supply cycles. This allows you to accumulate real sales data, observe how inventory turnover changes, and adjust the next order before placing it.

With this approach you also gradually build a working rhythm with the supplier: they see recurring orders, become accustomed to your packaging and labelling requirements, and make fewer errors at dispatch.

Another practical tool is separate tracking for each SKU within a shipment. Even if the overall shipment volume is growing, individual SKUs may sell at different rates. A shipment balanced by SKU based on sales data is more effective than a blanket increase of the entire order.

The Role of the Warehouse and Supply Operator When Moving to a Regular Rhythm

At the stage of regular shipments, what happens to the cargo before dispatch plays a key role. Receiving and inspecting goods at the warehouse in China makes it possible to identify discrepancies before the cargo is on its way. Consolidating shipments from several suppliers into one dispatch affects the final volume, packaging, and documentation.

The sooner you begin delegating these functions to a specialist operator, the easier it becomes to scale volume without a proportional increase in the operational burden on your business.

This material is current as of 2025. Specific calculations depend on the product category, route, and your supplier's terms.

Frequently Asked Questions

How do I calculate the safety stock for the first regular shipment? Use 20–30% of the calculated volume as a guideline if demand is unstable or the supplier experienced delays during the test purchase. If the supplier is reliable and demand is steady, the safety stock can be reduced, but should not be eliminated entirely: production lead times are rarely fully predictable.

Does shipment volume affect customs clearance? Yes. The volume and value of a shipment affect the documentation structure, the amount of duties, and VAT under official importation. When transitioning from a small test volume to regular shipments, it is worth clarifying with the operator in advance how the customs burden will change and what additional documents will be required.

What should I do if the test shipment sold out too quickly and there is not enough data for a calculation? Use a conservative scenario: assume that the actual sales rate is 70–80% of what the test showed, and calculate the volume on that basis. It is better to under-order and experience a minor shortage than to over-order and freeze working capital.

How does seasonality affect the volume of a regular shipment? If your product has a pronounced seasonal peak, shipment volumes should vary depending on the time of year. An order for the peak period is placed in advance, accounting for the production and logistics cycle. Shipments in the low season are reduced to avoid accumulating slow-moving stock.

Already working with a logistics provider? Send us the parameters of your last shipment, and we will compare the calculated weight, cost structure, and lead times.