Robotic In-Space Assembly Simulator

A payload fairing has a hard maximum diameter, so a rocket can only launch one already-assembled structure up to a fixed size. Robotic in-space assembly breaks that ceiling by launching the target structure as many small modules and letting a robotic arm dock and join them in orbit, one joint at a time, until a structure far larger than any single fairing could carry is complete. Set the target structure's size (which sets how many modules and joints the mission needs) and the reliability of a single robotic joint step, then watch the arm build the structure while the live overall mission success probability — the compounding product of every step's success chance — drops as more steps are required.