1. Replenishment cycle: the time it takes from the start of replenishment to the final entry of the product into the warehouse.

When considering this schedule, take into account all possible events. For example, customs delays and wire transfer issues.

2. Available days: how many days the current inventory can still be sold.

For sellers, you can use the amz4seller tool amz4seller system and click on "Inventory Reminder" under the "Store Analysis" column. If it is the first time to use inventory reminders, you need to set the parameters first to make the tool more personalized.

Most sellers have to go through the following process to replenish goods: requesting payment (about 1 to 3 days), domestic logistics (about 3-5 days), and the first leg to overseas (5-7 days), so it is safer to use the 15th sold out as the basis for early warning. However, you must set the most appropriate one according to your product. After setting, the inventory reminder function can automatically calculate the estimated number of days that can be sold and the recommended replenishment quantity.