The project resource search index is used to store and retrieve information about project resources such as their availability, qualifications, preferences, etc. The project resource search index is used for three purposes:
Display resource details: The project resource search index provides the resource details such as name, email, job title, organization, etc. that are displayed on the resource search page.
Filter counts while you search for resources: The project resource search index provides the filter counts that show how many resources match each filter criterion on the resource search page.
Calculate Resource Qualification Scores: The project resource search index provides the qualification information such as skills, certifications, languages, etc. that are used to calculate the Resource Qualification Scores for each resource based on their match with the resource request. The project resource search index does not provide absence details for resources or calculate Resource Availability Scores. These are provided by other components such as Oracle Fusion Absence Management and Oracle Fusion Human Capital Management. https://docs.oracle.com/en/cloud/saas/project-portfolio-management/20c/oapfm/manage-project-resources.html#OAPFM2356181