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The sustainable success of infrastructures is becoming a driving force for advancing urbanization globally. However, to achieve infrastructure sustainable success (ISS), how project management practices (PMPs) play their role remains unexplored in current literature. To this end, an empirical study on whether PMPs play significant impacts on the accomplishment of ISS was conducted.

This research is based on an empirical survey of domestic and overseas infrastructure projects managed by Chinese companies. 162 data samples were collected and further analyzed deploying structural equation modeling (SEM) on the basis of goal-setting theory. PMP factors derived from the plan-do-check-act (PDCA) ideology, i.e. culture, strategy, implementation and reflection were hypothesized and validated to have direct and indirect relationships with ISS.

The results of this study indicate that both culture and reflection can directly drive the PMPs toward ISS. Furthermore, it is revealed that by affecting mediator factors of strategy, implementation and reflection, culture is found to present an indirect influence on ISS; by affecting mediator factors of implementation and reflection, Strategy is found to present an indirect influence on ISS and by affecting the mediator factor of reflection, implementation is found to present an indirect influence on ISS.

These findings contribute to the body of knowledge in measuring sustainability success of project management performances by clarifying critical relationships of how PMPs lead to ISS. Prospectively, the outputs of this research will generate informative insights for practitioners to improve their PMPs in the process of pursuing ISS in future infrastructure management practices.

This paper aims to examine how ethical leadership alleviates knowledge contribution loafing among engineering designers through the mediating effect of knowledge-based psychological ownership and the moderating effect of emotion regulation strategies.

This study adopts a questionnaire survey to obtain 344 valid sample from engineering designers and uses partial least squares-structural equation modeling to analyze data.

The results demonstrate that ethical leadership is a key factor to alleviate knowledge contribution loafing. Knowledge-based psychological ownership is a main factor causing knowledge contribution loafing and mediates the influence of ethical leadership on knowledge contribution loafing. Furthermore, cognitive reappraisal (a response-focused emotion regulation strategy) moderates the relationship between ethical leadership and knowledge contribution loafing, and the effect of ethical leadership on knowledge contribution loafing is stronger when cognitive reappraisal is high.

Engineering design organizations may inspire ethical leadership and pay attention to psychological state of designers. Leaders may help designers overcome knowledge-based psychological ownership by the influence of ethical leadership. During the process of knowledge interaction, designers may adopt cognitive reappraisal strategy consciously.

This study addresses the knowledge gap that ethical leadership affects knowledge contribution loafing with knowledge-based psychological ownership as the intermediary. This study also advances the literature on leadership and emotion regulation and extends the scope of social learning theory in knowledge management domain through examining the moderate role of emotion regulation strategies.

The goal of making buy-in decisions is to purchase materials at the right time with the required quantity and a minimum material cost (MC). To help achieve this goal, the purpose of this paper is to find a way of optimizing the buy-in decision with the consideration of flexible starting date of non-critical activities which makes daily demand adjustable.

First, a specific algorithm is developed to calculate a series of demand combinations modeling daily material demand for all the possible start dates. Second, future material prices are predicted by applying artificial neural network. Third, the demand combinations and predicted prices are used to generate an optimal buy-in decision.

By comparing MC in situation when non-critical activities always start at the earliest date to that in situations when the starting date is flexible, it is found that making material buy-in decision with the consideration of the flexibility usually helps reduce MC.

In this paper, a material buy-in decision-making method that accounts non-critical activities’ flexible starting date is proposed. A ternary cycle algorithm is developed to calculate demand combinations. The results that making material buy-in decision considering non-critical activities’ flexible starting date can reduce MC in most times indicates that contractors may consider non-critical activities’ flexibility a part of the buy-in decision-making process, so as to achieve an MC decrease and profit increase.

Top managers who possess outstanding leadership competence make significant contributions toward achieving project success. The relationship between the top managers’ leadership and infrastructure sustainability (IS), one of the most important project success criteria, is empirically researched in this study. The purpose of this paper is to explore relationships between top managers’ leadership competence of intellectual competence (IQ), managerial competence (MQ), and emotional and social competence (EQ) and to explore relationships between leadership competence and IS.

Based on 246 obtained responses to a questionnaire survey across infrastructure projects in the context of the Chinese urbanization process, the analysis of the relationships between top managers’ leadership and IS was performed using a structural equation model (SEM).

Results indicate that top managers’ leadership competence, with MQ being the main determinant, followed by IQ, directly drives the entire life cycle of an infrastructure project toward accomplishing IS. Through positively influencing the moderate variable of MQ, EQ competence is found to have an indirect influence on IS.

In terms of practical implications, the outcomes of this research will provide criteria for the selection of top managers for infrastructure projects to realize IS during the process of Chinese urbanization.

The established SEM improves the leadership competence framework of IQ, MQ, and EQ in the respect of reflecting the context of infrastructure projects and promotes the research and development of leadership theory in the construction area.