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Item type:Publication, Transparency-based protocol for decision-making regarding seismic rehabilitation projects of public buildings(Elsevier, 2021-03-01)Motivation and problem definition: A large number of public buildings designed with obsolete criteria are at high seismic risk and in need of structural rehabilitation. The task of selecting the optimal strategy poses important challenges for decision-makers due to the variety of intervention options and the fact that the construction sector is perceived to be one of the most corrupt in the economy. Given that transparency is an efficient anti-corruption strategy, a protocol is proposed for decision-making in seismic rehabilitation projects of public infrastructure that incorporates criteria which serve to increase transparency in the project development. Methods: Firstly, the literature was reviewed to describe current practices and regulations linked to decision-making in seismic rehabilitation/retrofitting of buildings. Secondly, relevant criteria that should be taken into account to favor transparency in decision-making were proposed. Thirdly, these criteria were integrated into a protocol that uses information and communication technologies (ICTs), Building Information Modeling (BIM), and collaborative methodologies that involve all stakeholders that will participate in the decision-making process. Finally, the protocol was applied to a real decision-making case study for the selection of alternatives for large-scale reinforcement of state schools in the city of Lima. Results: The criteria of auditability or ease of control of the construction process is well regarded by stakeholders as a mechanism to increase transparency. Including these transparency criteria could influence the selection of reinforcement alternatives, especially if the profile of stakeholders is environmentally-oriented. The sensitivity analysis confirmed the dependency of the selection on the decision-maker profile. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A method to include life cycle assessment results in choosing by advantage (CBA) multicriteria decision analysis: a case study for seismic retrofit in Peruvian primary schools(MDPI AG, 2021-08-01)Building information modeling (BIM) is an emerging technology that improves visualization, understanding, and transparency in construction projects. Its use in Latin America and the Caribbean (LA&C), while still scarce, is developing in combination with multi-criteria decision-making (MCDM) methods, such as the choosing by advantages (CBA) method. Despite the holistic nature of MCDM methods, the inclusion of life cycle environmental metrics is lagging in construction projects in LA&C. However, recent studies point toward the need to optimize the synergies between BIM and life cycle assessment (LCA), in which a method like CBA could allow improving the quality of the decisions. Therefore, the main objective of this study is to integrate LCA and CBA methods to identify the effect that the inclusion of environmental impacts can have on decision-making in public procurement, as well as comparing how this final decision differs from an exclusively LCA-oriented interpretation of the results. Once the LCA was performed, a set of additional criteria for the CBA method were fixed, including transparency, technical, and social indicators. Thereafter, a stakeholder participative workshop was held in order to gather experts to elucidate on the final decision. The methodology was applied to a relevant construction sector problem modelled with BIM in the city of Lima (Peru), which consisted of three different construction techniques needed to retrofit educational institutions. Results from the LCA-oriented assessment, which was supported by Monte Carlo simulation, revealed a situation in which the masonry-based technique showed significantly lower environmental impacts than the remaining two options. However, when a wider range of technical, social, and transparency criteria are added to the environmental indicators, this low-carbon technique only prevailed in those workshop tables in which environmental experts were present and under specific computational assumptions, whereas teams with a higher proportion of government members were inclined to foster alternatives that imply less bureaucratic barriers. Finally, the results constitute an important milestone when it comes to including environmental factors in public procurement in LA&C. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A case study on the implementation of location tracking technologies for productivity monitoring: Understanding workers’ acceptance and socio-technical implications(Frontiers Media, 2024-01-09)Automated real-time data collection is becoming more prevalent in construction, with workers’ location data being a pivotal component in detecting poor logistics and inefficient construction flows. However, the collection of location data for productivity monitoring raises significant concerns about privacy and wellbeing implications for workers. Implementing such technological solutions requires an understanding of how humans may respond to sensor-based automated data collection, making this a socio-technical issue. This study identifies the drivers of construction workers’ acceptance of radio-based location tracking technology for productivity measurement using a modified Technology Acceptance Model (TAM) and offers a sociotechnical understanding of technology acceptance with implications for managing how new technologies are introduced on construction projects. Using a large residential project in Lima, Peru as a case study, construction workers were monitored using Bluetooth Low Energy (BLE) technology, and data were gathered using mixed methods. A k-means clustering analysis showed two forms of acceptance among workers: supporters (37%) and acceptance with reservations (63%). Partial least squares Structural Equation Modelling (PLS-SEM) results showed that perceived usefulness and perceived stress underpinned workers’ attitudes and intention to accept the technology. Perceived privacy risk, however, emerged as the sole most significant predictor at the end of the monitoring process. Findings further suggest that workers’ acceptance of the technology is influenced by the perception that it is also beneficial for safety management. Building on the preceding, the paper highlights the need for employee orientation focused on addressing perceived privacy concerns by leveraging positive perceptions about using monitoring technologies for improving onsite safety, logistics and productivity. This requires management of construction firms to develop narratives that reflect their goals for rolling out technologies in ways that ensure workers’ buy-in, and a re-focus on problem framing and collective approaches to identifying functional and less intrusive forms of monitoring technologies. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Collaborative planning of subcontractors using the Last Planner System: A case study on a gas subcontractor in repetitive housing projects(Technical University of Madrid, 2024-03-31)The efficient management of subcontractors turns into a challenge in contracts with fixed prices and short terms. Non-conformances due to poor deliverables are common, generating delays and cost overruns for all parties involved, especially for the main contractor. In addition, in recent years some collaborative systems have appeared, such as the Last Planner System (LPS), which has proven to be very efficient in the generation of value and the optimization of resources. However, there is still little information about successful results in the management of subcontractors. The main objective of this study is to propose a method that adapts the LPS for the management of the subcontract of natural gas facilities in highly repetitive housing projects, as well as to apply it successfully. The methodology was applied to a massive multi-family low-cost housing project in the city of Lima, Peru, which was modeled by using BIM technology. The most frequent root causes of non-conformances were determined for the first buildings, and this information was used for the collaborative planning of the following buildings. This allowed to determine the optimal sectioning, Takt Time Planning, subcontractor restrictions, weekly and daily planning, and finally, the lessons learned from the implementation of the LPS for future projects, which can be adapted to other types of subcontracts - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Management model using standardized contracts and BIM tools for the optimization of PPP projects in Peru(Multidisciplinary Digital Publishing Institute (MDPI), 2024-10-01)Public–private partnerships (PPPs) are contractual schemes that have relative success in Latin America due to their configuration, where the spirit of the contract lies in an appropriate distribution of risks. This is both the most important and fundamental aspect of this contractual scheme but also the most complex, as it is the main cause of contract modifications (addenda) in countries across the region. In this context, different concessionary contractual frameworks for PPPs on the national road network of Peru were evaluated, revealing common failure indicators that lead to contract modifications within the first six years of the concession. This study offers the development of a management model that includes the good practices of contractual management of NEC4 Option F and the application of BIM information management processes, optimizing the management of infrastructure through emerging technologies of information management supported by agile contractual schemes. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Framework for Integrating Productive, Contributory, and Noncontributory Work with Safe and Unsafe Acts and Conditions(MDPI, 2023-02-01)It is common for companies that are in the process of implementing the Last Planner System (LPS) journey to attempt an increase in productive work and a reduction in waste, such as contributory and noncontributory work. Even though the LPS has proven to have a synergy with the health and safety requirements, companies with deficient health and safety management systems tend to classify work involving substandard acts or conditions as standard, and then pretend to benchmark against other companies that are indeed performing safe work. The following work introduces a framework to simultaneously register and analyze productive, contributory, and noncontributory work, with the substandard acts and conditions in a construction site, allowing for the measurement of production and health & safety indicators simultaneously. In the absence of technology that automatically captures these indicators, it is proposed that simultaneous measurements be made through direct inspections and photo and video recording by means of a handheld camera. The proposed continuous improvement framework follows the steps indicated below: (1) defining the productive, contributory, and noncontributory work with surveys performed on the most representative stakeholders of the industry; (2) proposing a new classification of production and safety work; (3) assessing the level of application of the LPS in the company; (4) measuring the indicators; (5) improving the use of the LPS and performing new measurements; (6) statistically linking deadly, serious, and minor accidents, standard and substandard acts, standard and substandard conditions, and productive, contributory, and noncontributory work. This framework was applied to a case study of a building project in Lima and the results were improved simultaneous indicators, especially the health and safety indicators. Automated classification of productive and nonproductive work using technology still represents a challenge. - Some of the metrics are blocked by yourconsent settings
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Item type:Publication, Applying Minecraft Education as a Simulation Tool for Teaching Construction Management(Taylor & Francis, 2026-01-01)The construction and education sectors are facing the growing need for Construction 4.0 and 5.0 competencies, where traditional teaching methods fail to capture the dynamic nature of real construction projects. A method for achieving this is simulation-based learning, which is an experiential pedagogical approach that uses interactive scenarios to engage students in realistic decision-making experiences. For this reason, this study presents an innovative educational approach using Minecraft Education as a simulation tool for teaching construction management to undergraduate civil engineering students. In this research, three workshops were implemented at the university during autumn 2025, involving 89 undergraduate civil engineering students. The simulation enabled students to learn interactively competencies such as decision thinking, 3D building design, 4D time management, 5D cost control, and sustainability concepts. A pre-experimental design was carried out, and the posttest results differed significantly from the pretests results for the six questions related to the learning objective, with p-values less than 0.05 for both experimental groups. The Minecraft construction simulation has demonstrated its effectiveness as a simulation tool for teaching fundamental construction management concepts. This initiative can be considered a novel and a creative effort for construction management education.