This paper describes a decision-support system for trenchless technology projects that aids practicing professionals in the selection of the construction method that best satisfies project parameters. The model, named Innovative Modular Procedure for Evaluation of Construction Technologies (I.M.P.E.C.T), combines concepts from constraint satisfaction techniques, linear algebra, calculus, and applied statistics. The proposed model employs a two-step selection process, namely a technical evaluation to determine the technical soundness of the method and a preference evaluation where parameters controlled by the user are considered (eg. cost). Based on the results of the evaluations the model ranks the likelihood that each of the construction methods will satisfy overall project objectives. The proposed method represents a powerful decision-making model capable of addressing the complex and interacting technical, social, business, and risk aspects associated with many large trenchless technology projects.