This is because, while the doctor or physician gets the actual job done, the assistant facilitates the job, creating a smooth flow of activities in the clinic. (jobdescriptionandresumeexamples.com)
Open Living - The living room flows naturally into the dining area and kitchen creating a pleasant flow of activity throughout the rooms. (perfectplaces.com)
You need a constant flow of activity; your overhead is much higher. (remonline.com)