Transactional Business Intelligence organizes reporting data elements by business functions which are referred to as Subject Areas. Each subject area contains a collection of dimensional attributes and measures relating to one set of fact tables such as head count, FTE, salary, and so forth.
Transactional Business Intelligence allows you to create an BI Answers query that combines data from multiple subject areas. For example, at performance review time, you can create a query that reports the goal-setting status of employees by department. In this example, the cross-subject analysis would include “Full Time-Equivalent” from the “Workforce Management – Worker Assignment Real Time” subject area and “Count of Goals in Different Status without a Goal Plan” from the “Workforce Goals - Goal Status Overview Real Time” subject area.
BI Answers gives an administrator the flexibility to create a query joining any subject areas within the allowed security access. There are, however, some restrictions in using cross-subject analysis. See Restrictions in Using Cross-Subject Analysis.