An ad hoc committee typically refers to a group formed for a specific purpose, often for a limited time period. Other words that can be used to describe such a committee include special committee, task force, working group, or temporary committee. A special committee may be formed to investigate a specific issue or to develop a particular policy proposal. A task force may be assembled to address a complex problem, often with experts from different fields. A working group is often created to carry out a specific project or to develop recommendations on a particular matter. A temporary committee may be formed to oversee a specific event or project that requires short-term attention and focus.