So, as soon as the client orders, let's say a car, the operators start to put each subassemblies together, depending on what Car the client wants.
Let's say, the client can choose between SUV, Cabrio and family car.
Each differ from one another in the landing gear and the tires. The car-building process usually starts with the tires and landing gear, which then are combined with a motor and that's it.
Now, depending on what Car the client orders, the operator has to pick a different pair of tires and a different landing gear and put it then into the process-line.
How can I do this?