The aim of this work is to specify a domain through an enterprise architecture model in one of the macro processes the Comptroller General of the Republic of Colombia.The macro micro fiscal control process was identified as key to the fulfillment of the mission of the organization and a tool for modeling and simulation based on BPSim standard (Business Process Simulation) to detail the stages of the cycle ADM (Architecture Development was used Method), as the main component architecture framework TOGAF.Modeling and simulation showed that all paths of the process is activated and all the authorities set were completed, allowing establish that there is a set of conditions to model the reality of the organization and propose different scenarios from it.Based on the study results, it is concluded that the construction of an enterprise architecture from BPSim use of a tool, allows measure in a manner more appropriate to the needs of the organization to improve the performance of their business processes.