Product Manager: They are essentially the voice of the customer and upper management. They work on the product roadmap and determine the requirements for the pr

Product Manager: They are essentially the voice of the customer and upper management. They work on the product roadmap and determine the requirements for the product based on the needs that are determined by conversations with the stakeholders as well as other market research. In addition to this they also work on things like product pricing, release strategy, etc. Project Manager: They ensure that all the tasks for a project get done on time. They make the gantt charts, work with teams to break it down into sections, keep track of budgets, manage risks, report on progress to stakeholders, etc. I've never worked with a Product Owner since I understand it is mostly a software related position and that is not my area. From what I understand, they are an intermediary that sits between PdM and PjM.