The document discusses crowd-sourcing and its use in engineering. It defines crowd-sourcing as outsourcing tasks to a group or community through an open call. The document outlines how crowd-sourcing has been used successfully in other industries like design and provides examples of engineering-focused crowd-sourcing platforms. It also discusses best practices for companies using crowd-sourcing, including treating engineers with respect and clearly defining expectations. The future of crowd-sourcing in engineering is seen as positive if quality is maintained and engineers are respected.