//------------------------------------------------------------------------------
 //
 // adds a new machine to node
 //
 //------------------------------------------------------------------------------
 public void AddMachine(Machine m)
 {
     machines.Add(m);
 }
        //------------------------------------------------------------------------------
        //
        // adds a new machine to node
        //
        //------------------------------------------------------------------------------
        public void AddMachine(int year, int quarter, List <DayTime> dateTime, List <Job> jobs)
        {
            Machine m = new Machine(year, quarter, dateTime, jobs);

            machines.Add(m);
        }