In this paper. we demonstrate the usefulness of MoM (Method-of-Moments) based methods in efficient path-loss modelling for SISO (single-input single-output) communication links assisted by IRS (Intelligent Reflecting Surfaces). Being a full-wave computational electromagnetic tool. MoM is better equipped compared to high-frequency asymptotic methods like PO (Physical Optics). https://foldlyers.shop/product-category/educational/