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Production bug on Friday evening

Bug in produzione il venerdì sera · Engineering · Beginner

The case

At 6:30pm on Friday you discover the latest update to your e-commerce broke checkout: customers can't pay. The developer who deployed it is on vacation, unreachable. You lose about €2,000 in sales every hour. What do you do?

Alle 18:30 di venerdì scopri che l'ultimo aggiornamento del tuo e-commerce ha rotto il checkout: i clienti non riescono a pagare. Lo sviluppatore che ha fatto il rilascio è già in ferie, irraggiungibile. Perdi circa 2.000€ di vendite ogni ora. Cosa fai?

Read the case, write how you would solve it, in free text, no prompt required, and Grace's AI judges whether your solution actually works, solved or not solved, with a 0-100 score and coaching feedback that points at what is still uncovered without revealing the answer. Your first 5 evaluations each day are free.

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Frequently asked questions

What is the "Production bug on Friday evening" problem-solving case on Grace?

It is a beginner-level Engineering case based on a real workplace situation. You read the problem, write how you would solve it in free text, and Grace's AI judges whether your solution actually works, and tells you what is still uncovered.

How is my solution evaluated?

Grace's AI checks four things: whether you address the core problem (not just the symptoms), whether your plan is feasible within the constraints of the case, whether you consider risks and consequences, and whether you avoid the typical mistakes. You get a solved/not-solved verdict, a 0-100 score and coaching feedback.

Is there one correct answer to "Production bug on Friday evening"?

No. Grace judges the substance of your reasoning, not similarity to a script. Different approaches pass, as long as they genuinely solve the problem within the constraints described in the case.

Do I need to pay to try this case?

You get 5 free evaluations every day, shared with training scenarios, no credit card required. Beyond that, evaluations cost 1 credit each.

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