Mendelow's matrix helps to identify the relationships that should be built with different stakeholders. A stakeholder's position in the matrix depends on two factors:
Power- The power to influence the project.
Interest - The interest which the stakeholder has in the project.
Each stakeholder is placed in one box depending on each factor and then treated differently depending on where they are:
Minimal effort - e.g. Temporary employee on the project for just one day. Give them basic information to meet their needs, but pay little attention to them in decision making and strategy.
Keep informed - e.g. Full time project staff. Regularly communicate with them, particularly things they are interested in. This helps retain good relationships and ensures good motivation and coordination.
Keep satisfied e.g. Board of Directors over a minor IT update project. They have high power so to avoid them exercising the power they should be kept satisfied, for example by ensuring their needs are included in the project scope. As they have little interest only information is given to them as is necessary.
Key players (Keep Close) e.g. Project Customer - Regular communication is maintained and their goals and objectives included as part of the planning.