By allowing the automation of the เป็ฯ must have driven employees while working. The cost of supplying the first time may be high, but the operating cost is low.
With an automatic place into the cause does not require employees to work while driving. The cost of financing may be used for the first time. However, operating costs are lower
With automation of car makes so there"s no need a staff driven while at work. The cost of supply for the first time may be high. But the cost performance is low.