A proper alignment in my book takes the conditions the car is used, the actual driving characteristics and the prescribed specifications to produce the working answer. The answer is never the same and specifications are probably the least inportant of those ingredients.
I drive the car over a well known (to me) road about 4 miles to evaluate the performance. Then I align it using that condition and previous tire wear performance characteristics to shape my answer. I then drive the car over the same road course to verify my plan.
Any tech that just puts the car on the machine and aligns it and parks it isn't aligning the car in my book. His alignment can prevent tire wear but can not possibly deal with performance.
Bosch Master, ASE Master, L1
33 years MB technician