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How can a multiple elevator system reduce energy consumption while maintaining service quality?

hard📝 Trade-off Q8 of Q15
LLD - Design — Elevator System
How can a multiple elevator system reduce energy consumption while maintaining service quality?
AKeep all elevators running at full speed constantly
BGroup nearby requests and assign to the same elevator
CIgnore passenger requests during low usage times
DUse only one elevator regardless of demand
Step-by-Step Solution
Solution:

  1. Step 1: Identify energy-saving strategies

    Grouping nearby requests reduces unnecessary stops and elevator movements.

  2. Step 2: Eliminate inefficient options

    Running all elevators full speed wastes energy; ignoring requests or using one elevator hurts service.

  3. Final Answer:

    Group nearby requests and assign to the same elevator -> Option B

  4. Quick Check:

    Energy saving = Group requests [OK]
Quick Trick: Batch requests to save energy [OK]
Common Mistakes:
MISTAKES
  • Running all elevators constantly
  • Ignoring requests
  • Using only one elevator

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