%0 Journal Article %T Optimization of value chain management based on a supplier audit system %A Kazanskaya, L.F. %A Fedorova, A.N. %A Makarov, Y.I. %A Latypova, i.A. %K contractor audit, value chains, procurement management, supplier reliability assessment, quality control, risk management %J Bulletin of scientific research results %D 2026 %N 2026 %P 9 %I FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"