I am not sure what type of organization my job is. It seems to be a mixture of functional and matrix. Project managers are assigned to a project from their manager and the project can expand to different departments/groups depending on the stage of the project. My current project involves R&D, robotics, sample management and high throughput. Yet each department is structured like a functional organization where you have a manager who makes important decisions. It is not only one person but all functional managers making decisions based on their resources and workload. I guess it is not always clear cut?