decide what grouping includes which results. These rules directly effect how the search results are presented to users and therefore they influence how easy or difficult it is for users to navigate through a result set especially if it is a large one. 

The enterprise search application uses these tuning rules to add additional search query information and display relevant search results. Custom applications can use API to get and configure this information based on the application design. 

Factors influencing the sorting order of a search result set include boost factor for a field, for a URI pattern, document importance setting, document ranking filter, query expansion rules, and aggregate rules. 

## Configuring the boost factor for fields 

Each document field can be configured to add a relative boost factor. This affects the search result that is based on these fields being matched. 

To set the boost factor of a specific field: 

1. In the Parse and Index pane of the administration console, choose the Pencil icon. 

2. Select Index Fields  and click the Pencil  icon for the relevant field. 

3. Select the Fielded Search  check box and set the boost factor. 

Figure 12-13 on page 464 shows the window where you edit an index field setting. 

