Since its creation in 1875, the Canadian Supreme Court has undergone several institutional transitions. These transitions have changed the role of the Court toward a more explicit and influential policy making role in the country. Despite this increasingly significant role, very limited attention has been given to the Court. With this perspective in mind, this study presents several analyses on the decision making process of the Canadian Supreme Court. At the institutional level, the study found that within the stable workload, the cases composition has shifted away from private law to public law cases. This shift is more significant when one concentrates on appeals involving constitutional and rights cases. The study found that this changing pattern of the Court's decision making was a result of the institutional changes shaping the Supreme Court. Statistically, the abolition of rights to appeal in civil cases in 1975 was found to be the most important source of the workload change.