A load trucks is using a hoe equipped with a special 3½ cy light weight bucket....

A load trucks is using a hoe equipped with a special 3½ cy light weight bucket. Working efficiency is a 45 min-hr efficiency. The material is a sandy clay, 2,600 lb./lcy. The digging face will have an average height of 60% of max. digging depth and the angle of swing will always be less than 60º. The round-trip time of either truck, exclusive of load time, is 5 minutes Consider 2 truck sizes • 18 lcy and 26 lcy. • Operated the 18 LCY truck costs $55.62/hr • Operated the 26 LCY truck costs $73.18/hr • Operated the hoe costs $65.50/hr a. 10 pts.

a.Which haul fleet is cheaper?

b. 20 pts. You can increase your productivity with a better hoe operator, this new operation is reflecting an improvement of 5% of the loading cycle time. However, the Operated cost will increase from $65.50/hr to $68.05/hr. Does it make sense to improve the operation? (from a cost estimation point of view). What would you decide to do and why?

Expert Solution

Hie.

The question is vastly related to practical scenarios and is insightful as well. However, let us concentrate on the solution first.

Note(extra comment) - I think the solution is a bit on the conservative side since I have assumed 100% filling capacity of trucks but since we have to consider the same parameters for both fleets, the effect will be countered. I hope this suffices but for any query of yours, I am available @ comment section to assist and support. Please upvote the answer if you liked it. Thank you and take very good care of yourself. Happy Learning.

Ally Wells answered 1 year ago

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