I think as a project manager you would want a matrix structure. Project-based structure lacks efficiency in that there can be members of the team who are specialized in certain areas, but that area is not needed for that project.For example, if you are working on a strictly mechanical device you may not need chemical or electrical engineers on the team. Also the lack of communication with other project teams is detrimental, as someone from another team may know more on the topic and be able to contribute. Matrix structure is efficient because the project manager gets to essentially draft the most knowledgeable and effective members for the task at hand. This way the team is all on the same understanding level and everyone’s potential is maximized, leading to the best result.