MMD makes sure that the machinery, equipment and facilities at DWPS are
   performing in the right way and are on a level of efficiency that allow the production to
   continue. 
          
  
     The jobs of MMD are divided into:

 - Scheduled maintenance jobs, which are done to prevent malfunction.

 - Unscheduled maintenance jobs, which are to fix existing malfunctions.

        - Preventing maintenance jobs, which are scheduled and are done on
          machinery while operating.


      
 - Expected maintenance jobs, which are scheduled and are done using a
          computer to verify how well the machinery is operating.