Control charts are one of the statistical tools for solving quality related problems.

There are various non-statistical tools that have been typically developed by lean companies, notably by Toyota for minimizing variability in production, such as standardization, introduction of takt time, synchronization, shortening the total production lead time which I am fond of referring to as non statistical tools.

The Kaizen Philosophy assumes that our way of life - be it our working life, our social life, or our home life - deserves to be constantly improved.

Under the lean system, any tools which are required for solving problems are used.

The standard is not writ on the stone. The definition of the standard is that it is the best way to do the job for now. It should be regarded as a next step to make further improvement.

Control charts are one of the statistical tools for solving quality related problems.

To assure the prosperity of a firm should be a long-term strategy and the turnover of key managers should be taken into account from the stand point of long-term consideration and not from the monthly or quarterly flavors.