TY CONF TI ECONOMIC EFFICIENCY ASSESSMENT OF OPTICAL LUMBER SORTING SYSTEMS IMPLEMENTATION IN THE CONTEXT OF INDUSTRY 4.0 KW Optical sorting KW economic efficiency KW automation of wood processing KW lumber KW payback period KW import substitution JO INNOVATIVE APPROACHES TO AUTOMATION, ROBOTIZATION AND MANAGEMENT IN TECHNICAL, ORGANIZATIONAL, ECONOMIC SYSTEMS AU Liskin, D.S. AU Popov, O.V. AU Scherbakova, I.V. PY 2026 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov