Performance excellence┬áMartin Ashcroft finds lean returning home to automotive through process improvements in a vehicle rental business. The business philosophy we now know as ÔÇ£leanÔÇØ has its roots in automotive manufacturing with Toyota. Many other industries have since seen its value, and the language of lean can now be heard in the corridors of healthcare facilities and financial institutions ÔÇö anywhere, in fact, where waste can be eliminated from processes.