Formal assessment, with an external agent. These tend to take a long time to complete (to the point that staff can dismiss them as now obsolete) and to include prolonged wordsmithing (which sands off sharp insight in favor of milder references to problems and opportunities).
Internal assessement, often done as a SWOT or other analysis connected to a strategic plan. These tend to avoid touchy areas such as board or staff leadership issues. They are also in many cases not grounded in realities of how customers see the organization’s value.