A French manufacturer of warehouse logistics robots had to multiply its volumes by nearly four by 2030 and consolidate production in a new building. Its modular cell-based assembly, effective at the start, could no longer keep up: long cycle times, heavy reliance on technicians, large floor footprint, under-utilized workshop (TCUP ≈ 53% in 2026). The design study for a flexible paced assembly line — Design Optimizer mission — defined a quantified target model: produce more, on less space, with a much wider cadence range. The first gain is space.