Context

In the late 2010s, around 2017 to 2018, BMW entered the electric vehicle market with the i3 under uncertain demand and without prior experience in mass-producing carbon-fiber bodies. Existing production lines were optimized for stable, high-volume output with fixed rails and short takt times. That setup constrained a product with variable volume and new manufacturing requirements.

Architect for Flow

Demand uncertainty and material risk required a production system that could absorb variation without large upfront commitments. AlnAlign BMW treated capacity and flexibility as economic variables and avoided locking into a fixed, high-throughput line. StrStructure The i3 was split into a Drive Module and a Life Module. Product architecture and production architecture were designed together. Each module could be built on a dedicated line with its own constraints, while a defined interface allowed final integration. PkgPackage The interface between the modules enabled parallel assembly and late integration. The production system was packaged around interchangeable routing using autonomous carriers instead of fixed rails, so workstations could be rearranged through software.

Accelerate

CstConstruct Parallel lines for the two modules and a final bonding station implemented the design. Autonomous platforms replaced rail-bound transport and allowed physical flow to follow demand rather than a fixed sequence. OpsOperate The line ran with variable throughput and software-controlled routing. Capacity shifted from 130 to 200 units per day without retooling. The production system remained stable while its configuration changed at runtime.

Outcome

By 2018, BMW had established a production system that matched the uncertainty of the product. The modular split reduced coupling, and the configurable line absorbed demand variation without structural changes. Production scaled from 130 to 200 units per day without committing to a fixed volume upfront.