Each stakeholder category deserves its own detailed consideration. It is the manager’s responsibility to set clear rules and maintain focus and goals across all involved members. Otherwise, the project may never end because it is impossible to please everyone.
The initial goal should be to get the project off the ground. Determine who makes the final decision. For example, if you are building a house, its commissioning depends on the government agency that authorizes its use, not just the sponsor or customer.
My first rule: categorize stakeholders by their influence on the project's completion.
This helps maintain clarity and direction from the start.