Donald G. Reinertsen Famous Quotes
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We should not prioritize on the basis of project profitability, but rather on how this profitability is affected by delay.
Since high capacity utilization simultaneously raises efficiency and increases delay cost, we need to look at the combined impact of these two factors. We can only do so if we express both factors in the same unit of measure, life-cycle profits. If we do this, we will always conclude that operating a product development process near full utilization is an economic disaster.
without variability, we cannot innovate. Product development produces the recipes for products, not the products themselves. If a design does not change, there can be no value-added. But, when we change a design, we introduce uncertainty and variability in outcomes. We cannot eliminate all variability without eliminating all value-added.
If we have drifted 10 heads above the zero line in our coin flip experiment, what is the probability of getting 10 tails in a row to return us to zero? About 1 in 1,000.
Reducing risk, which is the primary mission of testing, clearly creates economic value for product developers. In fact, reducing risk is so centrally important to product development that it is indispensable for us to quantify its economic impact.
If you are going to worry about it, I won't.
The more detailed we made our plans, the longer our cycle times became
In our factories, we create flexibility by paying more to workers who can work at more stations on a production line. We value flexibility, and we pay for it. In contrast, most product development organizations exclusively reward specialization.