> For the complete documentation index, see [llms.txt](https://docs.zephyrintel.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zephyrintel.com/analytics/install-base-analytics/read-install-base-leaders-top-customers-and-recommended-spares-to-stock.md).

# Read Install Base Leaders, Top Customers and Recommended Spares to Stock

Three ranked cards at the top of the Install Base Analytics tab call out where your installed equipment and stocking opportunities are concentrated.

### Install Base Leaders

Ranks the top brand and model combinations by how many units your organization has in the field, shown as **{n} units**. Use it to see which equipment shows up most in your customers' plants. When there is no matching data, the card shows "No install-base assets found for the selected brands."

### Top Customers

Ranks customers by the size of their installed base, shown as **{n} units**. Use it to find the accounts with the most equipment to service and sell parts into. When there is no matching data, the card shows "No customer install-base data for the selected brands."

### Recommended Spares to Stock

Ranks spare parts by how often they are flagged as a recommended spare in equipment bills of materials, shown as **{n} qty**. A part counts here when a manufacturer's parts list marks it as a recommended spare for the equipment your customers own. Use it to decide what to keep on the shelf. When there is no matching data, the card shows "No recommended spare BOM data found."

### Notes

This feature may not be enabled for your organization. Ask your Zephyr Intel contact.