From my experience so far as a Mechanical Engineer for my company, I believe my company would be closest to a weak Matrix-based organization structure. A Matrix-based organization means that reporting relationships and collaboroations are set up in a grid rather than the traditional hierarchy of management. So employees are constantly collaborating with employees of other departments in order to carry out the goal of a certain project. The reason that it I believe it is a weak Matrix-based organization is because it still borrows some aspects of the Functional-based organization structure. There still exists a fine line of hierarchy within each department and employees are grouped by their specialty whether it be Engineering, Marketing, Quality, etc. Within this weak Matrix organization, Project Managers are more like collaborators rather than authority when overseeing a project.