Lean Production is a way to make workers and work more flexible and efficient by using the four principles:
1 Minimize waste.
2. Make perfect quality since the first opportunity
3.Lini flexible production
4 Continuous Improvement

In facilitating the four principles above, there are the main characteristics that must be done, including:
1 Improvement of mass production.
2 Producing flexibly to varying product.
3 Focus on the process plant.
4 Emphasis on supplier management and the efficiency of resource usage.
5. detailed production schedule ..

Doing four lean production principle with regard 5 characteristics, then the workers will be achieved flexibility and efficiency of their work. But it must be done continuously in every production, even though the things we want has been reached. Point for production over time will be well and happy and satisfied single worker doing his job.