If we believe that the only reason why our products have problems is due to human error and lack of discipline, then we'll just keep trying harder to create a better specification.
Our product development process will be specification-driven will look something like this:
If we believe that a product specification must inevitably contain flaws, then we will work continuously to detect these flaws.
Our product development process will be feedback-driven based on customer preferences and will look something like this:


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