Exploring the impacts of COVID-19 pandemic on risks faced by infrastructure projects in Pakistan

Azeem, Gohar; Mirmozaffari, Mirpouya; Yazdani, Reza; Khan, Rao Aamir

doi:10.1504/ijads.2022.121558

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…The pandemic has caused significant delays in implementing CPEC projects due to restrictions on the movement of labor and materials. These findings are consistent with previous research [ 60 ]. The pandemic has also reduced productivity in CPEC projects due to social distancing measures and safety protocols.…”

Section: Data Analysis and Resultssupporting

confidence: 94%

Exploring the China-Pakistan economic corridor project performance during Covid-19 pandemic

Mahmood,

Sun,

Abdein

et al. 2023

Heliyon

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Section: Data Analysis and Resultssupporting

confidence: 94%

Exploring the China-Pakistan economic corridor project performance during Covid-19 pandemic

Mahmood,

Sun,

Abdein

et al. 2023

Heliyon

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“…They also created a polynomial algorithm for the case where the shop has more than two machines. Preemptions are not allowed to minimize the makespan, which has been applied in several studies [29][30][31][32][33][34][35]. Optimal finish time (OFT) is used in different scheduling problems to find the OFT of open-shop problems and offers a linear time algorithm to see the OFT of open-shop problems with two machines [36][37][38][39].…”

Section: Literature Reviewmentioning

confidence: 99%

A Novel Hybrid Simulated Annealing for No-Wait Open-Shop Surgical Case Scheduling Problems

Rahimi

Hejazi

Zandieh

et al. 2023

ASI

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In this paper, the problem of finding an assignment of “n” surgeries to be presented in one of “m” identical operating rooms (ORs) or machines as the surgical case scheduling problem (SCSP) is proposed. Since ORs are among NP-hard optimization problems, mathematical and metaheuristic methods to address OR optimization problems are used. The job or surgical operation ordering in any OR is a permanent part of all sequencing and scheduling problems. The transportation times between ORs are defined based on the type of surgical operations and do not depend on distance, so there is no surgical operation waiting time for transferring. These problems are called no-wait open-shop scheduling problems (NWOSP) with transportation times. The transportation system for the problems is considered a multi-transportation system with no limitation on the number of transportation devices. Accordingly, this study modeled a novel combined no-wait open-shop surgical case scheduling problem (NWOSP-SCSP) with multi-transportation times for the first time to minimize the maximum percentile of makespan for OR as a single objective model. A mixed-integer linear program (MILP) with small-sized instances is solved. In addition to the small-sized model, a novel metaheuristic based on a hybrid simulated annealing (SA) algorithm to solve large-sized problems in an acceptable computational time is suggested, considering the comparison of the SA algorithm and a new recommended heuristic algorithm. Then, the proposed hybrid SA and SA algorithms are compared based on their performance measurement. After reaching the results with a numerical analysis in Nova Scotia health authority hospitals and health centers, the hybrid SA algorithm has generated significantly higher performance than the SA algorithm.

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“…The contractor discovered that there were insufficient finances to finish the remaining portion of the job. Therefore, it has been proposed that the strategies should be aligned with the coordination of the customer in order to finish the remaining portion of the project [8].…”

Section: Literature Reviewmentioning

confidence: 99%

Project cost and time key factors distressing building construction projects of Sindh Pakistan: a post-pandemic approach

2023

Archives of Civil Engineering

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The construction industry plays a major role in the boost of the country's economy, providing basic facilities for residential and creating thousands of job opportunities. During COVID-19, the construction sectors in Sindh Pakistan was highly suffered and leading to delays in the completion of projects. As the construction sector was globally affected, building construction projects were also affected by completing the projects on estimated time and cost. Thus, this research investigates the significant factors of time and cost that affected the Hyderabad building construction projects during COVID-19 situation. Questionnaire surveys were designed to collect data from the employees working on building projects in Sindh Pakistan. The collected data was analyzed through the Average Index method. Unsafe working environment; shortage of workers; and increasing project cost was observed as significant factors that were highly affected during COVID-19. The results and findings shall be supportive for stakeholders to take into consideration of factors in the early stage of the expected pandemic situation. This research suggested that the stakeholders shall modify or amend the contract clause regarding for pandemic situation and incorporate the identified factors in the contract that should be considered by stakeholders to save the time and cost of the projects.

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Exploring the impacts of COVID-19 pandemic on risks faced by infrastructure projects in Pakistan

Cited by 7 publications

References 3 publications

Exploring the China-Pakistan economic corridor project performance during Covid-19 pandemic

Exploring the China-Pakistan economic corridor project performance during Covid-19 pandemic

A Novel Hybrid Simulated Annealing for No-Wait Open-Shop Surgical Case Scheduling Problems

Project cost and time key factors distressing building construction projects of Sindh Pakistan: a post-pandemic approach

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