Within the scope of the “Distribution Network Investment Optimization” project, we held a workshop at Gdz Elektrik Dağıtım A.Ş. (DisCo) on 04-05 December 2023 regarding; 1) Econometric demand projection techniques and algorithms, 2) Regional demand development S-curves calculation techniques and algorithms, and 3) Modeling of the calculated regional demand projections in DIgSILENT PowerFactory for grid planning analyzes.