One fix at a time

As someone who used to advise dealerships on how to dispatch work, I can tell you that work is not necessarily assigned by who is best in any particular task. Work is assigned to the technician who is available to do the work and who has the necessary skills to perform the task. Any competent technician can do routine maintenance work. For example, you don't need the world's best wheel balancer to do a wheel balance because even an average one can do a good enough job.

If a task is difficult or requires special skills, it will be assigned to a technician with those skills. some shops have people assigned to alignments and oil changes if they do a large enough volume of that work. A TEAMS shop will assign the work to a team and then you could have a team of techs working on the car. An apprentice would do the oil change, a journeyman might do a timing belt replacement, and a master tech might fix that odd drivability problem.

I have visited a lot of different dealerships, well over 100. Some are very large and service several hundred vehicles a day, and some are small, servicing a dozen vehicles.

A shop with 10 bays that is well-run probably services 50 to 75 vehicles per day with somewhere between 7 and 10 technicians. Ideally, there are 1.5 bays per technician, and each technician services an average of 5 vehicles per day. A tech assigned purely to oil changes would service a lot more, probably 20 or so.

It sounds like the dealership is practicing what you are looking for, that is, having a qualified technician service your vehicle. On the trips where all you have done is an oil change, the tech doing the oil change is probably an apprentice because it doesn't take a master tech to do one. On the trips where you have several things done, the work is assigned to a technician who is capable of doing everything on the list.

All the work done in a shop can be divided into 2 basic categories: maintenance and repair. Maintenance work is stuff like oil changes, battery replacements, brake jobs, muffler replacements, shock absorbers and strut replacements, and periodic maintenance like tune-ups. Maintenance work is the most profitable work for a shop because little diagnosis time is needed and few problems are encountered when doing the work. Repair work is diagnosing and repairing a transmission or driveability problem, hard start, broken sunroof, etc.