Software testing should be part of a much larger process for software quality assurance. When complex systems are built from many subsystems, it’s vital to understand, measure and manage the software quality assurance process for all systems from end to end. Here, Knowledge Center contributor Rex Black discusses software quality and testing lessons that IT professionals should learn from the debacle that recently befell Toyota. – How the mighty have fallen. Starting in the 1980s, Japanese companies became legendary for quality and none more legendary than Toyota. But earlier this year, Toyota led the news due to quality problems. The situation was so severe that Toyota CEO Akio Toyoda personally appeared at a Congressional h…