Retained search firms provide a guarantee to do an assignment over if the hired candidate leaves before a stated milestone (anywhere from one year to three years), generally with the caveat there has not been a material change in the position requirements or management team. In a retained search, the fee is for the time and expertise of the search firm. The firm is employed to conduct the entire recruitment effort from startup until the candidate has started working. There are many considerations taken into account when organizations determine whether to hire a retained or other type of search firm, including time and financial resources available, goals of the position search (such as diversity factors), and the importance of discretion and confidentiality.