Building a regulated water bill from its blocks
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The prompt
Riverbend Water (a fictional company in England) has a regulatory capital value of GBP 10 billion. The regulator allows operating costs of GBP 800 million a year, run-off (depreciation) of GBP 400 million a year and a return of 4.03 percent a year. It bills 2.5 million households. What is its allowed revenue, and the average bill per household? Then recompute the bill with a return of 4.20 percent.
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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