The handoff problem
Every handoff between vendors adds freight, lead time, double margin, and a quality seam. A part that forms at one shop, trims at a second, and assembles at a third accumulates cost and risk at each border.
What 'under one roof' buys
Forming, composites, metal fab, extrusions, robotics, CNC, and assembly in one building means no inter-vendor shipping, one quality system, and one program manager who can answer for every step.
Why OEMs are consolidating
Supplier rationalization is a board-level priority. An integrated thermoformer collapses a multi-vendor chain into one PO, one contract, and one accountable partner, usually at lower total cost.