TEM Journal. Volume 11, Issue 4, pages 1748-1757, ISSN 2217-8309, DOI: 10.18421/TEM114-41, November 2022. 1748 TEM Journal – Volume 11 / Number 4 / 2022. Expert System for the Prevention of Occupational Risks in Construction - Residential Buildings Gustavo Hurtado 1 , Rosario Rojas 1 , David Mauricio 1 , José Santisteban 2 1 School of Systems and Computer Engineering, Universidad Peruana de Ciencias Aplicadas (UPC), Lima, Peru 2 AI Group, National University of San Marcos (UNMSM), Lima, Peru Abstract – Construction companies consider it a priority to prevent occupational accidents and diseases, despite this, accidents in this sector prevail. This study presents OHSYS, an expert system specialized in the prevention of occupational safety in the construction of residential buildings, which evaluates a building project and it is recommended to security officer, actions to mitigate occupational risks. The results show that the number of recommendations increases on average by 7 and 13 for OSH levels of 90% and 100% when using OHSYS. In addition, the satisfaction, usability, and efficiency survey applied to 10 experts show that OHSYS has a very high score (4.5 out of 5). Keywords – expert system, building, occupational safety, regulations, occupational hazards. 1. Introduction The construction industry accounts for 13% of the world's GDP ($10 trillion) with projected growth of $15.5 trillion by 2030 led by China, India and the USA [1]. The subsector of residential building construction, in 2017, billed $4,171.3 billion, and it is estimatedthat by 2022 it would reach $6,800.9 DOI: 10.18421/TEM114-41 https://doi.org/10.18421/TEM114-41 Corresponding author: David Mauricio, School of Systems and Computer Engineering, Universidad Peruana de Ciencias Aplicadas (UPC), Lima, Peru. Email: pcsidmau@upc.edu.pe Received: 26 August 2022. Revised: 03 October 2022. Accepted: 18 October 2022. Published: 25 November 2022. © 2022 Gustavo Hurtado et al; published by UIKTEN. This work is licensed under the Creative Commons Attribution‐NonCommercial‐NoDerivs 4.0 License. The article is published with Open Access at https://www.temjournal.com/ billion with an annual growth rate of 10.3% [2]. For [3], this subsector delivers a value added of 23% to industry and is the third with the highest productivity below the industrial and civil sectors. However, this industry is one of the most dangerous due to its high rate of occupational accidents, reaching 20.5% and 11.6% in occupational deaths and non-fatal accidents, respectively, in Europe, in 2018 [4], and 19.89% of occupational deaths with a cost of $1.29 billion and $87.62 million for accidents in the USA, in the year 2019 [5]. Work-related hazards stem from unsafe working conditions and unsafe work behaviors [6], [7] defines risks as the likelihood of harm or injury to specific people or groups exposed to the hazard (a risk is created by a hazard). For [8], the risk factors that most influence safety in the sector are lack of coordination, poor work and organization, economic and time pressure, low involvement of workers in safety, inadequate training, poor selection and use of equipment, and low awareness. In addition, it is observed that the design of safety in construction can help reduce risks, as 42% of accidents are related to this task. It is estimated that the violation of occupational safety and health (OSH) management represents 4% of the world's Gross Domestic Product each year [9]. In recent decades, countless efforts have been made to promote safety and health in work environments worldwide through regulations and compliance with the measures correctly implemented. This is because it has been proven that the creation of a culture of safety prevention reduces the risk of incidents, as they register 64% fewer security incidents and 58% fewer hospitalizations [10]. In addition, information technology reduces the complexity of processes in organizations [11]. Therefore, the prevention of occupational risks is one of the main concerns in many countries since occupational accidents represent a significant source of risk. Therefore, companies must have a culture of prevention that allows identifying the risks involved in the work of