From a lab result to a replacement plan
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The prompt
Fictional and illustrative. Your PhD found that a delivery van battery loses 2 percent of its capacity every 100 full charges. A delivery firm in India charges each van once a day. It replaces a battery when it falls to 80 percent of its first capacity. Assume the loss is steady. When should the firm plan to replace its batteries?
Practice with a partner
1. Send the interviewer link to a friend. They read the case aloud and hold the answers.
2. You open the candidate view: you see only the prompt, a timer and a notes box.
3. Speak the case out loud. Your partner shares data when you ask, then scores you with the rubric.
Interviewer view
For the person running the case
Candidate view
For the person answering the case
Clarifying questions, with the interviewer's answers
My notes on this case
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