This page provides answers to common questions about Inventory Performance Index (IPI).
The IPI score and inventory performance dashboard are only available for sellers with a Professional selling plan.
IPI score measures how efficient and productive you are in managing your FBA inventory. Multiple factors can influence your IPI score, but it is important to do the following:
Your IPI score is designed to represent your overall inventory performance. When you take actions to improve your inventory efficiency, these actions can take time to result in an improved IPI score.
While everyone’s business is different, we recommend the following general guidelines to manage your inventory performance:
As IPI measures the efficiency and productivity of your FBA inventory over time, higher IPI scores usually indicate that you are managing your inventory more efficiently. This means that you are optimising your sales and minimising your storage costs, and may result in an improved storage limit allocation during the next quarterly adjustment cycle.
New ASINs in their first 90 days don’t affect your IPI score.
For information, go to FBA inventory storage limits.
Once a removal order request is placed, the inventory no longer affects your IPI score. Remember that actions taken today, such as a removal order, will take time to be reflected in your IPI score.
You can improve your sell-through rate by increasing sales in relation to your in-stock inventory or removing inventory that is not selling. To improve sales, review your pricing and consider one or more of these options:
If you ship a lot of inventory to Amazon, your sell-through rate could be affected if your sales do not keep pace with your shipments over the same time period.
Sell-through rate is updated daily and looks at past 90 days of shipped units and average inventory over that same period. We encourage you to try to maintain a sell-through rate in the green (or ‘good’ rating) year round.
Your FBA sell-through rate is your units sold and shipped over the past 90 days divided by the average number of units available at fulfilment centres during that time period. We take a snapshot of your current inventory levels of 30, 60, and 90 days, to calculate the average units available. For example: You shipped 120 units in the past 90 days, and you had an average of 80 units available during that time period. Your sell-through rate would be 120/80 = 1.5, as shown below.
|Total units sold (cumulative) in past 90 days||120 units|
|Date||Today||30 days ago||60 days ago||90 days ago|
|Inventory available||80 units||150 units
(new shipment of 150 units received)
|40 units||50 units|
Average available inventory = (50 + 40 + 150 + 80) / 4 = 80 units
Sell-through rate = 120/80 = 1.5
You will only be able to view your IPI score if you have a Professional selling plan, inventory at a fulfilment centre, and recent account activity. If you are new to FBA or have not been active in the past 13 weeks, you may not have an IPI score until more data becomes available.