Information technologies (IT) promise great benefits. However, companies have business alignment problems, affecting investment, performance and agility. To achieve alignment, enterprise architecture (EA) reference models called Frameworks have been developed. These proposals were born in large companies and their design has a traditional approach to these realities. However, in Peru most companies are micro-enterprises, i.e. small organizations (SOs), with their own characteristics. SOs have a low Networked Readiness Index (NRI), generating little impact on Peru’s development. Therefore, this paper proposes a new business architecture methodology conceived for the reality of small Peruvian and Latin American organizations. A general method based on EA and SO criteria was developed, thus generating a metamodel, from which the elements of the methodology are instantiated, which integrates four approaches to IT management. The methodology developed was validated in a Peruvian SO and by experts. The preliminary results show that its use generates benefits with respect to the competition.