# View Run Indexing QC

Available only for indexed runs, the Indexing QC page provides indexing QC results for the run. View unexpected results for a sample, or confirm that all indexed samples are properly represented.

The first section contains a table that summarizes the indexing performance for the selected lane.

* Total Reads: Total number of reads.
* PF Reads: Total number of clusters passing filter.
* % Reads Identified (PF): Percentage of clusters passing filter that are assigned to an index.
* % Reads Undetermined: Percentage of clusters passing filter that could not be assigned to an index.
* CV: Coefficient of variation for the number of counts across all indexes.
* Min: Lowest representation for any index.
* Max: Highest representation for any index.

The graph displays the **% Reads Identified (PF) Per Index** for the selected lane.

The second section shows % Reads Identified (PF) Per Index in the **Per Index** table.

* Index: A unique number BaseSpace Sequence Hub assigns to each index for display purposes.
* Sample ID: The sample ID assigned to an index in the sample sheet.
* Library Name: The library assigned to an index in the sample sheet.
* Index 1 (i7): The sequence for the first index read.
* Index 2 (i5): The sequence for the second index read.
* % Reads Identified (PF): Percentage of clusters passing filter that are assigned to the index.