A campaign feasibility study is a critical part of campaign planning, helping a nonprofit to set goals with a strong degree of confidence that they are appropriate and achievable, and knowing that the case for support has resonance with prospective donors. A feasibility study tests the case that you plan to make to donors; it can help to shape the project that is the subject of the campaign; and it can identify voluntary leadership to drive the campaign. In this primer on feasibility studies, we answer nine questions including how the process can be used for more than just campaign planning.