according to Claude Maley,
"...is the discipline of planning, organizing, and managing resources to bring about the successful completion of specific project goals and objectives....The primary challenge of project management is to achieve all of the project goals and objectives while honoring the established and agreed-upon project constraints. Typical constraints are scope, time, and budget."
Graphic by Karn G. Bulsuk (http://www.bulsuk.com). Originally published at http://www.bulsuk.com/2009/02/taking-first-step-with-pdca.html [CC-BY-3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons