This system proved ineffective, so in 1816 the Senate adopted a formal system of 11 standing committees with five members each. Three of those committees, the Finance, Foreign Relations and the Judiciary Committees exist largely unchanged today, while the duties of the others have evolved into successor committees. With the advent of this new system, committees are able to handle long-term studies and investigations, in addition to regular legislative duties. According to the Senate Historical Office, "the significance of the change from temporary to permanent committees was perhaps little realized at the time." With the growing responsibilities of the Senate, the committees gradually grew to be the key policy-making bodies of the Senate, instead of merely technical aids to the chamber.