: Identifying and reducing queues (invisible work-in-progress) is critical for speed and efficiency.
Donald Reinertsen’s The Principles of Product Development Flow defines second-generation lean principles, emphasizing that managing invisible queues and Economic Cost of Delay is more critical than mere manufacturing efficiency. The framework advocates for reducing batch sizes and utilizing decentralised control to optimize product development speed and innovation. For a detailed summary of these principles, see SlideShare . principles of product development flow pdf
The book’s greatest contribution is replacing intuition with . Reinertsen argues that nearly every trade-off (fast vs. cheap, quality vs. speed, parallel vs. sequential) can be resolved by quantifying the cost of delay . He provides practical formulas for calculating CD3 (Cost of Delay Divided by Duration), a prioritization metric superior to simple ROI or gut feel. For a detailed summary of these principles, see SlideShare
Manufacturing hates variability. Product development requires variability (innovation is, by definition, unpredictable). The trick is not to eliminate variability, but to decouple it from your schedule. cheap, quality vs