Toyota is credited with creating a production-system approach to managing factories. The Toyota Production System is widely copied, and is complex yet simple. It can be boiled down to these few practices:
Involve the entire organization in seeking continual improvement
Train workers to perform tasks in standardized procedures
Eliminate waste of all kinds - including waste of motion and waste of space
Empower workers by allowing them to stop production when quality is threatened
Minimize inventory, and maintain a level production flow.