Toyota's legendary commitment to quality and its workforce are facing their biggest challenge in 50 years. Until recently, there was only one company in Asia with a triple-A rating. And when that company announced that the grandson of the founder was taking management control of the company, it was a bit like the return of a super hero. At the press conference announcing the elevation of Akio Toyoda to the CEO and president position of the world's largest car company in late January this year, one of the senior managers came out with a line that struck the journalists assembled...