The complexity assessment process is dynamic, and a project's complexity should be reviewed and updated every time key changes take place (e.g., major changes in scope, resources, technology or corporate strategy). Understanding any project's business and technical complexities helps in assembling the right sponsors, project manager and team, as well as the inherent risks. Determining the overall complexity should factor prominently into the decision whether to proceed with the project. So here is my advice to project managers: Don't take on a project whose complexity outstrips team capabilities unless it is a prototype and the only goal is to learn from it.