Which unique supply chain strategy did Tesla implement to overcome production bottlenecks during its early Model 3 manufacturing ramp-up?

The electric vehicle revolution has transformed not just how we drive, but how automotive companies design their supply chains. Tesla has been particularly innovative in this area, creating new paradigms for manufacturing and distribution in the transportation industry. How well do you understand Tesla's unique approach to supply chain management that helped it scale production of its electric vehicles?

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Creating a massive tent-based assembly line (GA4) outside its Fremont factory to increase production capacity
Fully outsourcing battery production to Asian manufacturers to focus solely on vehicle assembly
Implementing a build-to-order system with no inventory, similar to Dell's computer manufacturing model
Establishing micro-factories in each major sales region to minimize shipping costs and delivery times