Turbo machinery is complex and really expensive to take care of. Good maintenance practice is very important to get the maximum service life from the equipment. Most industrial maintenance departments will schedule large jobs even if the planning is done by the maintenance worker just before the job starts. Most maintenance departments will plan shutdowns due to huge negative impact on revenue of having the plant out of service. In a Planned maintenance job the resources are obtained at the beginning and the job is executed without interruption. The planning effort is to make the average and lower workers work at this level. Finally, planning is not completed unless you list everyone who needs to know what will happen. Communication Planning is essential.