This ensures that answers can be reliably aggregated and that comparisons can be made with confidence between sample sub groups or between different survey periods.
Structured interviews are a means of collecting data for a statistical survey.
Though context effects can never be avoided, it is often desirable to hold them constant across all respondents.
[6] Structured interviews have been found to provide better hiring decisions as they are more accurate and objective.
Also Google started them too after data-driven research found it to be beneficial over more common unstructured interviews.