Within the Erbert and Gerbert's section of the food court, they make a limited variety of sandwiches $"$to stock", to be placed in a refrigerator until someone comes by to purchase one.

Suppose when making these to$-$stock sandwiches they first set up the assembly station with all the ingredients needed to make Boney Billy sandwiches, and make $10$ of them. They then reconfigure the assembly station and make $10$ Comet Morehouse, and finally reconfigure again to make $10$ Jacob Bluefinger.

What approach is being used to produce this product variety?

dedicated resources for each different sandwich type

mixed model repetitive production

intermittent batch production