Intelligence Density (ID) is a framework that measures the productivity and quality of knowledge work outputs from decision support systems. It assesses four key areas: the quality of the system's model in terms of accuracy, explainability, and response time; the engineering dimensions such as flexibility, scalability, and ease of use; the quality of available resources like tolerance for noise and complexity; and logistical constraints regarding independence from experts and development speed. The document provides examples of how ID could be applied to evaluate different systems based on these criteria.