Technically, the JCSC is the highest military body; and its chairman serves as the principal staff officer (PSO) to the civilian prime minister, Cabinet, National Security Council (its adviser), and president. The JCSC deals with joint military planning, joint training, integrated joint logistics, and provides strategic directions for the armed forces; it periodically reviews the role, size, and condition of the three main service branches; and it advises the civilian government on strategic communications, industrial mobilisations plans, and formulating defence plans. In many ways, the JCSC provides an important link to understand, maintain balance, and resolve conflicts between military and political circles. In times of peace, the JCSC's principle functions are to conduct planning of civil–military input; in times of war, the chairman acts as principal military adviser to the prime minister in the supervision and conduct of joint warfare.