TY JOUR TI ESTIMATION OF THE EFFICIENCY OF FLEXIBLE PRODUCTION SYSTEMS AND ROBOTIC COMPLEXES USING SIMULATION KW lean manufacturing KW flexible manufacturing systems (FMS) KW robotic systems KW simulation KW queuing theo-ry KW performance indicators JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Duyun, I.A. AU Chuev, K.V. PY 2021 IS 6 PB Belgorod State Technological University named after V.G. Shukhov