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Product development is not product assembly. In a past life, I worked as an industrial engineering technician in the automotive industry. We were applying Lean Manufacturing practices. In development, you minimize waste and maximize value. In assembly, you optimize for speed and efficiency.

I know very smart people have applied Lean to software development, but it feels to me like some wires got crossed. Assembly is your CI/CD pipelines. You want that fast. Development requires a cross-functional team. Measuring issue open to issue close times isn't about speed; it's about waste.