A pharmaceutical manufacturer shadowed sales representatives in the field to observe some 150 interactions between sales reps as well as physicians and support staff. They watched sales reps tactic the doctors, how they got everywhere their gatekeepers how they carried their brands messages, and so forth. These explanations led to improvements in training new reps. In what category of study would this study fall? Offer advantages and disadvantages of this category of research. What would be the subsequent step in the marketing research process?