Who manages all maintenance work at a factory and what are their essential tasks?

1.A team leader (Manager/Supervisor) 1.1.To assign task.
1.2.Give guidance.
1.3.Arrange necessary trainings for team.
1.4.Hold meetings for continuous improvement.
1.5.Feedback to customer.
2.QA/QC Inspector 2.1.QA-To assure the activities are going on as per pre-define standards (customer requirements).
2.2.QC- testing, inspection etc to approve activity performed as per standards.
2.3.Documented evidence of work done.
2.4.To maintain equipment history files.
3.Mechanics/ Technicians 3.1.Trained on specific task given.
3.2.In time completion of tasks

In mostv of the organisations, maintenance mangemnet is done through a system.The system comprises of 1.
Maintanence aplanning Group.
2 Maintanence execution group withsubjectt expertise ( Mechanical, Electical, ConTrol & Instrumentation, Civil etc).
3.
Condition Monitoring Group.
All these groups work in close cordination: 1.
As per the feed back received from Operation GRoup on the functional issues.
2.
as per Planned Maintennance programme developed by Maint teams with various inputs.
3. 
based on the Condition of the equipment.
  Apart from above system take care of 1, Skill development of the team.
2.
Development of Quality Assurance Programme.
3.
Spares Procurement 4.
Spares Development