The use of interviewing could help researchers gather valid and reliable date form interviewees that relate to research questions and objectives. Interviewees could give their personal experience to the author according their working experience. In addition, the interviewing will be progressed as one-by-one form which is the most appropriate method and relatively easy to arrange. There are five interviewees chosen from the case company who have professional experiences in managing or implementing JIT system of the company. Their background is summarized in Table I.