Production Ramp-Up: The Hidden Cost of ‘Just-in-Time’ Optimism

生产爬坡：‘准时制’乐观主义的隐性成本

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Our ERP forecasted 98% machine uptime during ramp-up—but real-world data showed 37% of delays stemmed from sub-tier suppliers failing JIT delivery of gaskets and fasteners.
The ‘lean’ schedule assumed zero learning curve for new operators on the CNC line, ignoring that proficiency requires 117 documented cycles—not calendar days.

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