Step-by-step explanation:
A focus group can be defined as a qualitative marketing research method where some people with common characteristics are brought together in a group who are guided by a trainer to promote discussions on a particular topic of interest and gather information to assist in decision making.
To organize focus groups for an innovative German-style fast food restaurant, you could separate 3 groups, the first being ages 18 to 30, the second 30-45 and the third group 45 and above.
The screening criteria could be, sources of income, profession, sex, taste for food, hobbies, etc.
The questions to ask could be related to the number of times a week people eat fast food, what is your favorite German food, how much are you willing to pay for the options offered in the restaurant, what elements do you consider most attractive in a restaurant ,etc.