In the previous chapter we addressed the complex mélange of factors – market, sociocultural, physical, and policy – that have been identified as underpinning the reassertion of industrial production within inner city districts of the modern metropolis. From this survey a synthetic model of principal motive forces was constructed as a means of interpreting the processes of new industry formation within the metropolitan core, including the rich interactions that comprise the relational geographies of production within advanced economic systems. The basic dimensions and operational characteristics of this model can be identified, with some variation, in new industry sites across a diverse range of cities.