This document summarizes the use of the EFFECT modeling tool to help develop low-carbon growth scenarios and strategies for Indonesia and other developing Asian countries. EFFECT is an Excel-based bottom-up model that analyzes abatement opportunities and emission reductions across key sectors like power, transport, and buildings. The modeling will develop business-as-usual and low-carbon scenarios from 2010-2050 to inform climate policies and development plans. Close collaboration with local experts is needed to ensure accurate country-specific data and assumptions are used. The goal is to build local capacity to utilize these tools for long-term low-carbon planning and policymaking.