Quotes in data
Half the money I spend on advertising is wasted; the trouble is I don't know which half.
Quality, productivity, and innovation can be significantly increased if companies provide all employees with practical tools for exploiting potential information
People who can't understand numbers are useless. The gemba where numbers are not visible is also bad. However, people who only look at the numbers are the worst of all.
Management must provide employees with tools that will enable them to do their jobs better, and with encouragement to use these tools. In particular, they must collect data.
The only way to find out what will happen when a complex system is disturbed is to disturb the system, not merely to observe it passively.
It is easy to date an earthquake, but not an economic decline.
Whenever there is fear, you will get wrong figures.
Dividing one number by another is mere computation; figuring out what you should divide by what is mathematics.
When a theory really has got your brain in its grip, contradictory evidence - even evidence you already know - sometimes becomes invisible.