The document outlines Plone application development patterns utilized by The Nature Conservancy, emphasizing lessons learned from two projects: ConPro and East. ConPro faced challenges due to unclear requirements and excessive reliance on user input, leading to a complex and delayed project, while East benefited from a well-defined scope and collaborative UML modeling, resulting in a successful and efficient development process. The document also discusses defining application patterns that integrate technology components and address specific institutional needs.