What to ask to customers

Can you tell me about a specific problem you've faced in your restaurant recently?
How did that problem impact your business?
What did you do to solve that problem?
Can you share any metrics or data that show the impact of that problem and how you solved it?
How do you currently measure the success of your solutions to these types of problems?
Can you tell me about a specific instance where a customer gave you feedback that was particularly valuable in helping you improve your business?
Can you tell me about a specific decision you've made recently that was based on customer feedback or data?
Can you tell me about a time when a solution or product you tried didn't work out as well as you had hoped? Why do you think it didn't work?
Can you share any specific examples of how you have differentiated your restaurant from others in the local market?
Can you tell me about a time when you had to make a difficult decision about your restaurant and how you went about making that decision?
Can you describe the biggest challenges your restaurant is facing?
Could you elaborate more on that challenges and how you handle them?
What have you done to retain customers?
Have you tried to solve labour issues or obtain customer data? If so, how was that go?
How do you stay competitive in the local restaurant market?
Can you tell me about any technology or software you currently use in your restaurant and its effectiveness?