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This study aims to evaluate and synthesize literature on exoskeleton implementation in the construction industry to understand their current applications, evaluate existing research approaches and identify critical areas for future investigation. Through a comprehensive analysis of empirical studies, the research seeks to establish a clear roadmap for advancing exoskeleton adoption in construction work.

This study conducts a systematic literature review following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines. By searching relevant databases and applying predefined inclusion criteria, the review focused on empirical studies that evaluate the effectiveness and acceptance of exoskeletons in construction. Both objective parameters (EMG data, Kinematic analysis, heart rate) and subjective parameters (user comfort, perceived exertion, usability surveys) were analyzed to assess how impactful are exoskeletons among construction workers.

The review identified 236 publications, of which 36 were included, revealing several critical insights: (1) A significant reliance on studies conducted in controlled environments, accounting for 77.78% of studies. (2) A limited representation of actual construction workers, mainly non-construction worker volunteers, which may affect the practical relevance of the findings. (3) A significant gap exists in standardized evaluation protocols, with researchers using varying assessment methods that hinder cross-study comparisons. (4) Predominantly short-term nature of existing studies. These findings highlight the need for more real-world testing, standardized evaluation frameworks and longitudinal studies.

This review contributes original insights into the deployment of exoskeletons in the construction sector, particularly highlighting the industry's gap in direct, in situ engagement with construction workers. It suggests that future research should prioritize long-term, onsite studies to achieve a more comprehensive understanding of exoskeletons’ impacts, thus supporting the development of targeted intervention strategies for reducing work-related musculoskeletal disorders (WMSDs) among construction workers.

Compressing the schedule by using overlapping activities is a commonly adopted approach for accelerating projects. However, this approach might channel a variety of risks into the construction processes. Risks imply waste; still, evaluating the effects of using overlapping activities on schedule quality has been a looming gap in construction research. Therefore, this paper aims to study the quality of overlapping in terms of emerging waste and to demarcate the boundaries of the overlapping envelope.

This study presents a method for assessing the consequences of implementing overlapping activities in a schedule on two types of waste namely waiting time and variation gap. A critical path method (CPM) network including eleven activities is modeled stochastically where the durations of individual activities are sampled as beta-distributions. Using program evaluation and review technique (PERT) assumptions to calculate the schedule dates, the network is simulated for various amounts of overlapping and the corresponding waste is quantified each time.

Results show that not only the returns on overlapping are diminishing after a certain overlap percentage, but also waste in the production system increases. Particularly, results reveal that compressing the schedule leads to a decrease in variation gaps, but at the same time, it leads to a larger increase in waiting times, which creates more waste.

The presented study shows through simulation how overlapping activities affects productivity by identifying wastes. It shows that despite the apparent gains, overlaps should be used with caution, and while considering the side-effects of increased waste which introduces a need for increased managerial awareness.