This document describes a study of three citizen science projects: Mountain Watch, the Great Sunflower Project, and eBird. The study investigated how project design and implementation affect scientific outcomes by examining organizers' perspectives. Key findings included the influence of design approaches on science vs lifestyle engagement, implications of community engagement, relationships between technologies, environments and data quality, and how resources and scale impact sustainability and institutions. The research contributed a new theoretical model and comparative analysis of how technologies and processes can support public scientific participation.