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21 " why American industry adopted lean manufacturing 30 to 40 years after these methods began to produce benefits in Japan? Was it because the Japanese hid this approach from Western eyes? No. American industry waited until the full-scale implementations of these ideas at Toyota could no longer be ignored. "
― , The Principles of Product Development Flow: Second Generation Lean Product Development
22 " Cadence is the use of a regular, predictable rhythm within a process. This rhythm transforms unpredictable events into predictable events. It plays an important role in preventing variability from accumulating in a sequential process. "
23 " One of the biggest advantages of these three demand-focused approaches, demand blocking, WIP purging, and flexible requirements, is the speed with which they can be executed. "
24 " We live in an uncertain world. We must recognize that our original plan was based on noisy data, viewed from a long time-horizon. "
25 " We live in an uncertain world. We must recognize that our original plan was based on noisy data, viewed from a long time-horizon. For example, we may have started development believing a feature would take 1 week of effort and it would be valued by 50 percent of our customers. As we progressed through development, we may have discovered that this feature will require 10 weeks of effort and it will only be valued by 5 percent of our customers. This is a factor of 100 change in its cost-to-benefit ratio. "
26 " Cadence causes events to happen at regular time intervals. Synchronization causes multiple events to happen at the same time. "
27 " When a software development process moves to daily test cycles, we gain the benefits of smaller changes, fewer open bugs, faster feedback, and faster cycle time. "
28 " Reducing batch size reduces variability, and with lower variability, we may find our existing capacity is already sufficient. "
29 " Product development produces the recipes for products, not the products themselves. "