This document presents a method for using benchmarking in the enterprise architecture planning process. It discusses benchmarking best practices from other organizations to help develop the target architecture and transition plan. The method uses the Federal Enterprise Architecture Framework reference models to identify benchmarkable domains across the business, data, application and technology layers. A multi-step benchmarking model is then described that involves normalizing data, calculating distances between options, and restricting options to identify best practices for the target architecture. The goal is to reduce risks and speed up the enterprise architecture planning process by leveraging benchmarks from successful organizations.