Robotic workcell simulation is a modeling-based problem solving approach developed for the design, analysis, and offline programming of robotic workcells. Current industrial practices show that commercial robotic simulation software packages are able to provide designers with an interactive and virtual environment in which credible solutions for robotic workcell designs can be obtained. However, conducting robotic workcell simulation studies via robotic simulation packages require designers to carry out complex processes of modeling, programming, and analysis, which often results in technical challenges and difficulties. In this paper, a methodology for developing robotic workcell simulation models via Deneb IGRIP technology is introduced. The development of the method is based on successful applications of Deneb's IGRIP robotic simulation software in designing real robotic workcells.