A historical analysis method for studies based on the Cultural-Historical Activity Theory

This study presents a historical analysis method grounded in the Cultural-Historical Activity Theory (CHAT), developed to reconstruct the developmental trajectory of an activity system. The method integrates the principle of historicity to identify critical events and phases of development. Based on the case of the Sustainable Swine Production Program (3S Program), the study demonstrates how historical events can be interpreted through analytical concepts such as period, historical events, critical events, phases of development, and the model of an activity system, revealing transformations in its object and structure. The theoretical contribution of the method lies in the operationalization of the principle of historicity in empirical research and in providing analytical tools to understand long-term changes in work activities. From a methodological perspective, the historical analysis method proposed herein offers researchers a systematic approach for examining data generated through formative interventions, such as those conducted within the Change Laboratory. From a practical standpoint, the method offers a framework for researchers and practitioners to analyze and support transformative processes in various contexts for the development of work and the resolution of social problems.