In this episode we discuss transition of microbial fermentation from controlled laboratory settings to the complex realities of industrial manufacturing. It characterizes productivity not as a simple biological trait, but as an emergent property shaped by mechanical constraints like oxygen transfer limits, non-ideal mixing, and equipment drift. I would like to emphasize that performance often declines at scale because large vessels create spatial gradients and environmental oscillations that small-scale reactors do not replicate. Successful scale translation requires prioritizing operational resilience and robustness over the pursuit of maximum theoretical yields. Ultimately, the sources argue for using scale-down modeling and conservative design to align biological potential with the inevitable engineering variability of a factory environment.