Consider the equipment replacement problem presented in the chapter.Recall that in the network model formulation of this problem a node represents a year when the equipment was purchased.An arc from node i to node j indicates that the equipment purchased in year i can be replaced at the beginning of year j.How could the network model below be modified to depict an equipment purchase in year 4 and operating costs only through the remainder of the planning window?
A)Modify the cost on arc 4-5 to account for only operating costs.
B)Add a second arc 4-5 to represent just the operating costs.
C)Add a dummy node,6,so that arc 4-6 represents just the operating costs.
D)Add a dummy node,6,so that arc 4-5 represents operating costs and 5-6 represents new equipment purchase.

Question

Consider the equipment replacement problem presented in the chapter.Recall that in the network model formulation of this problem a node represents a year when the equipment was purchased.An arc from node i to node j indicates that the equipment purchased in year i can be replaced at the beginning of year j.How could the network model below be modified to depict an equipment purchase in year 4 and operating costs only through the remainder of the planning window? 
A)Modify the cost on arc 4-5 to account for only operating costs. 
B)Add a second arc 4-5 to represent just the operating costs. 
C)Add a dummy node,6,so that arc 4-6 represents just the operating costs. 
D)Add a dummy node,6,so that arc 4-5 represents operating costs and 5-6 represents new equipment purchase.

Quizplus · Accepted Answer

The Answer is C

Consider the Equipment Replacement Problem Presented in the Chapter