Have you worked in an environment that demanded a high level of adherence to routine?

They're attempting to gauge whether you'll burn out quickly from the monotony of the job, or if you thrive in a regimented, rule-bound environment. Offer your understanding of what the position you are interviewing for looks like. Communicate you understand that this aspect of the job is more arduous than it seems. Elaborate on how your experience correlates with the expectations of the job. Relate an equivalent experience.