Texas stands to profit from Apple's American Manufacturing Program, with additional factories and partnership at Samsung's Taylor fab.

A global technology giant is gearing up to make waves in the Lone Star State. Apple Inc. recently announced it will be increasing its U.S. investment to $600 billion over the next four years, with plans to expand operations in Texas.

Apple made a big pledge at a White House event. But the logistics of creating a gadget like the iPhone, and managing its cost, are complex.