An interviewer will evaluate how consistent your non-verbal cues are with what you say, whether you answered one question one way and a similar question differently, to the consistency between your interview and what you've detailed on your resume. These will clue them into your attention to detail and the consistency they can expect in your work performance. How well you produce error-free, high-quality work within given timeframes will be evaluated based on your attention to detail, adaptability, and flexibility. So, keep your answers consistent.
Attention to detail is only valuable when quality doesn't sacrifice meeting deadlines and accomplishing goals. So, emphasize your understanding of the distinction between quality and quantity and explain why striking a balance is important. Explain your process for proofing your work for errors. This will come down to a combination of technical skills and aligning all the necessary facts and figures to a conclusive result. Items you want to touch on in your answer are your organizational skills and your methodology or approach to project management, the level of your attention to detail, and the standard you set for your work.
