In my experience as a risk engineer, to know who your project stakeholders is vital. The knowledge of Project Risk Management and Stakeholder Management are closely related because stakeholders can pose a risk, positively or negatively. Positively means your stakeholders can pose a opportunities which bring profit. Negatively means brings adverse effect on your project time-cost-quality.
Big or small, your project can and will affect, or be affected by other people, or organization other than your project team. These people are called stakeholders. Stakeholder is any individual, group or organisation that can affect, be affected by, or perceived itself to be affected by a programme.
My Life, My Adventure 