Abstract: Methods, systems, and computer program products comprising computer readable instructions for generating efficiency metrics for knowledge workers. Data for symbol contributions of a knowledge worker is used for calculating Knowledge Discovery Efficiency (KEDE), which is a ratio between the symbol contributions of the knowledge worker for a time period indicated by a time aggregation type and a predetermined constant representing an estimated maximum amount of symbol contributions that can be contributed for the time period indicated by the time aggregation type. Templates and fraudulent values of the contributions are excluded from the calculation.