private void Update( )
 {
     ///Decrease time if > 0 else Leave
     if (!_customerModel._hasFinished)
     {
         if (_customerModel._time > 0)
         {
             _customerModel._time -= Time.deltaTime * _timerDecreaseSpeed;
             _customerView.UpdateTimer(_customerModel._time);
         }
         else
         {
             Leave( );
         }
     }
 }