Lifting a London sandwich line's output
New to this industry?Start with its one-minute summary: Restaurants and food service
Bar chart: Steps and capacity on a sandwich line. Values in sandwiches per hour. Prep: 120; Assemble: 60; Wrap: 100; Checkout: 90.
The prompt
A sandwich kitchen in London has the step capacities in the chart above. Lunch demand is 85 sandwiches an hour over a three-hour peak, and each sandwich earns GBP 3 of contribution. A second assembly worker would raise Assemble to 100 an hour and cost GBP 30,000 a year. Is it worth it?
Interviewer-led: the interviewer shows the capacity chart and asks for the bottleneck, the value of fixing it, and what limits the line next.
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
My notes on this case
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