This series of FPM articles offers practical lessons from the Direct Observation of Primary Care (DOPC) Study, which was funded by the National Institutes of Health and conducted by the Center for Research in Family Practice and Primary Care, with support from the AAFP. The study demonstrates the complexities of the patient visit, the demands of real-world practice and the value of primary care, issues that policymakers, the public and even clinicians have not fully understood. Researchers used a multi-method approach, including direct observation, to study 4,454 patient visits to 138 family physicians in 84 practice sites.