The Inventory Performance Index, or IPI, is a metric to gauge your inventory performance over time.
IPI score measures efficiency and productiveness of your FBA inventory. Multiple factors could influence your IPI score, however, the most important ones are your actions: 1) maintain a balanced inventory level between sold and on-hand inventory and 2) fix listing problems. Your IPI score is going to have an effect on your storage limits in the future.
For answers to common questions, go to IPI frequently asked questions.
There are two categories of recommendations to help you improve your IPI:
The IPI dashboard displays a performance bar for each of the two categories:
The Inventory Performance page also provides additional metrics within each factor, which you can see by selecting Show more details. Clicking the Show more details box associated with each category will take you to related inventory management tools that provide recommendations to improve your performance.
When inventory is not available for purchase due to a listing problem, it results in lost sales and storage costs. This inventory is referred to as stranded inventory. Your stranded inventory percentage is the percentage of your FBA inventory units that are currently not available for purchase on Amazon.
In addition to the performance bar, two related metrics are displayed with the stranded inventory percentage on the Inventory Performance dashboard:
Maintain the right balance of inventory with your rolling 90-day FBA sell-through rate, which is your units shipped over the past 90 days divided by the average number of units on hand in our fulfillment centers during that time period.
In addition to the performance bar, two related metrics are displayed with your FBA sell-through rate on the Inventory Performance dashboard: