[LMH]

Here's a simplistic overview as an example:
Ford is switching to alternators during the Cobra production. AC engineers a mount that bolts to the engine, mounts the alternator and fits in the car.
Involvement Ford and AC.
The wiring harness needs to be adapted to the alternator.
Involvement Ford, Lucas and AC.
Shelby wants U.S. spec cars to have SW gauges.
Involvement SA, AC and SW.
I know it's a simplistic overview but it involves a number of different entities to make the changes and improvements happen.
Larry