The great unbundling: from integrated architecture to orchestrated fluidity in the software defined vehicle era

This paper theorises a fundamental paradigm shift in architecture theory, driven by the software defined vehicle.It posits the inverted mirroring path, a conceptual framework that overturns the traditional causal logic of the mirroring hypothesis.In this new paradigm, product architecture ceases to be a mirror of internal organisational structure and instead becomes a dynamic strategic interface that actively mediates exogenous forces -institutional mandates, market dynamics, and user experience.The Chinese SDV ecosystem exemplifies this architectural unbundling: flexible industrial policy, a user base demanding perpetual evolution, and a proactive swarm strategy pursuing emergent heterogeneity have institutionalised a fluid design paradigm.Within this paradigm, the boundary configuration on what to integrate, decouple, or outsource becomes the primary locus of competition and value creation.Consequently, competitive advantage is redefined: it derives not from optimising a fixed architecture, but from a firm's capacity to orchestrate architectural fluidity within an open, evolving socio-technical system.