Table 2.

Interview sample questions by CFIR domain.

CIFR Domain	Selected question examples
Intervention characteristics	Do you think the changes were difficult to implement? Did the changes make your work very different from how it was done before? What were the costs to making the changes? How were the changes developed? Who developed the changes? Inclusion in process?
Inner setting	How did the characteristics or set-up of [Restaurant] affect the implementation of the changes? Why were the changes developed at [Restaurant]? Do you think there was a strong need for this change? How well do you think the changes and the collaboration fit with the values, mission or norms within [Restaurant]?
Outer setting	How well do you think the intervention met the needs and wants of [Restaurant’s] clients? Are there barriers for clients to benefit from the changes promoted by the intervention? Can you tell me what you know about any restaurants similar to [Restaurant] that are doing similar innovations? Were there financial incentives or other incentives that influenced your decision to participate? Are you aware of regulations, policies or guidelines at the national, state, or local levels that may promote healthier eating in restaurants?
Process	Crosscutting domain, capturing reflections and evaluations across the different areas
Characteristics of individuals	How would you describe the changes or innovations implemented? (knowledge and attitudes of interviewees)