Current Situation: Each delivery hub gets a fixed number of company-owned delivery vehicles, regardless of the order volume in that area. Goal: Allow hubs to "trade" their vehicles freely, shifting more cars to hubs with higher order volumes and more frequent use, reducing the company's average delivery time.
Key Assumptions/Evaluation Points
For this "vehicle trading" to potentially shorten the average delivery time, the following must hold:
a. Some hubs face vehicle shortages due to high orders and high demand.
b. Other hubs have vehicles idle during certain times.
c. These idle vehicles can be traded and quickly fill the gaps in busy hubs.
d. Additional vehicles reduce delivery time in those hubs.
Which piece of information best indicates whether the key conditions exist?
Among a∼d, management mostly assumes that hubs with high order volumes need more vehicles, and that more vehicles mean faster deliveries, which is generally true. The most uncertain aspect that directly impacts whether "vehicle trading" is feasible is that there must be truly "idle vehicles" available for trading; otherwise, no vehicles can be shifted, and the plan cannot be implemented.
Option D provides the exact information:
"Do some hubs have delivery vehicles idle at any time of the day?"
If the answer is "yes, there are idle vehicles," it means there's a source of vehicles for trading. If the answer is "no idle vehicles anywhere," then there's no vehicle to shift, and the trading mechanism is useless.
Therefore, to evaluate whether this plan can shorten overall delivery time, Option D is the most helpful.