This Project Managers Reference Manual is an updated edition of the original manual developed by the Glass Association of North America (GANA) in 2005. NGA and GANA combined into one association in February 2018. This manual serves as a reference for project managers within the glass and glazing industry who have a minimum of one year's experience. It covers everything from considerations in how to set up a project through the details of a successful project closeout. It is not meant to provide an exhaustive list, but to serve as a starting point for project manager training. It is the responsibility of the users of this manual to ensure that project managers comply with all relevant laws, rules, regulations, standards and other requirements, particularly contract obligations.