Management's job is to know which systems are stable and which are not.
The greatest waste โฆ is failure to use the abilities of peopleโฆto learn about their frustrations and about the contributions that they are eager to make.
Management by results is confusing special causes with common causes.
Nobody should try to use data unless he has collected data.
The process is not just the sum of its parts.
We should be guided by theory, not by numbers.