Full eHandbook under: http://www.msh.org/resources/health-systems-in-action-an-ehandbook-for-leaders-and-managers Effective supply management has the potential to make a powerful contribution to the reliable availability of essential medicines, which are a crucial part of the delivery of highqualit ... y health care services. Because medicines are costly and poor management so often results in waste, good supply management is also crucial to the cost-effectiveness of providing medicines. more