Based in your Position.
Example: "You need to listen to me, when i tell you to do this work. Because i have been put in charge".
This power stems for giving rewards. Example:
"I understand that you want to participate in the acceptance testing of this project . Because of your performance, I will assign you as part of that team".
The ability to penalize team members
Example: "If This does not get done in time , i will remove you from the group going to hawaii for the costumer meeting"
Being the technical or project manager expert.
Example: This project manager has been very succesful on other projects. Let´s give her a chance.
This power comes from another person liking you, respecting you, or wanting to be like you . It is the power of charisma and fame. Example: the most liked and respected project manager in the organization says, "i think we should change the content of our standard project charter".