In stable markets purchasing optimizes on price. In a ramp, availability decides. Critical components — electronics, sensors, special materials, drives — and certain raw materials cannot be scaled at will while several European programs ramp simultaneously.
Three operational requirements follow: transparency down to tier two and three, active steering of critical positions rather than reactive order processing, and dual sources wherever an interruption would hit the program.
In this environment, however, dual sourcing is not a fast measure. Qualification and release take time — which is why the decision must be taken long before the bottleneck, not after it.