The mediator's intervention has three phases: (1) entry, (2) designing and initiating the intervention, and (3) conducting the intervention and settlement. The entry phase often lasts longer and is more complex than for a two-party dispute. Forming an advisory committee can aid the entry process. During the second phase, the mediator must address such issues as the appropriate location and process, the frequency and length of meetings, and the possible need for more than one mediator. A setting away from daily job responsibilities is useful. When more than 20 participants are involved in a dispute, using more than one mediator is generally desirable. A combination of plenary sessions and small work groups is also useful. During the closure and settlement phase of the mediation, issues include documenting the issues and any consensus, maintaining participants' interest, drafting final agreements, and ensuring implementation. Recordkeeping is crucial in complex mediations. Interim reports and briefings are also useful. Final reports in complex disputes also need to provide detailed, technical information to ensure implementation. 1 reference.