Previous studies have identified the outcomes and critical success factors for Kaizen event effectiveness in performance improvement projects conducted by teams of participants under the direction of a facilitator. This study seeks to extend the previous research to the concept of locus of control - a personality trait that defines an individual's belief that events are controlled internally or externally. Locus of control has been reported to be associated with work success and other psychological aspects of life. The study hypothesizes that there exists a relationship between a Kaizen team's locus of control and Kaizen event success. This research presents an exploratory assessment of the relationship between locus of control (internal or external) for Kaizen event teams and social and technical system outcomes such as understanding of continuous improvement, team member skills and attitudes, goal achievement, impact on area, overall perceived Kaizen event success and an additional data envelop analysis relative efficiency measure.