4.3 the effect of the overdesign of convey capacity on the change of the conveyor's lowest total cost.
For the small conveyor, the user night need to increase the convey capacity in the future or sometimes need to temporarity increase the convey capacity.
For this situation, it may be preferred to overdesign the convey capacity.
This part analyzed the change of the lowest total cost when an overdesign of the convey capacity was conducted.
It could be seen from the fig. 6a-6b that when an overdesign value of 50 ton h^-1 added to normal convey capacitry of 100 ton h^-1 upward, the lowest total cost increased not more than 2%. This kind of tendecy could be found in other in clination angles as well, ass shown in fig. 6c-6d