Systems Thinking. Applied.
Edson, R. 2008. Systems Thinking. Applied. A Primer. Arlington, VA, USA: Applied Systems Thinking (ASYST) Institute, Analytic Services Inc.
This source is considered a primary reference for the Identifying and Understanding Problems and Opportunities article.
This book provides guidance in the techniques for defining a problem or opportunity. The full text of this source is available through the ASysT website.