Mixed-Integer Linear Programming Approach for Scheduling Repetitive Projects with Time-Cost Trade-Off Consideration

Zou, Xin; Fang, Shu‐Cherng; Huang, Yuansheng; Zhang, Lihui

doi:10.1061/(asce)cp.1943-5487.0000641

Cited by 25 publications

(12 citation statements)

References 11 publications

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“…Arditi, Tokdemir, and Suh (2002) suggested basic principles that can be used for planning repetitive schedules and noted that optimal repetitive schedules can be achieved by adjusting production rate and crew size using strategies to accelerate the production rate using LOB to adjust crew sizes. To reduce idle time while maintaining work continuity in a line-based scheduling method, several studies were conducted (Altuwaim and El-Rayes 2018;Ipsilandis 2007;Nassar 2011;Salama and Moselhi 2019;Zou et al 2016). Ipsilandis (2007) developed a multi-objective linear programming model for repetitive projects considering trade-offs in project schedules, where project duration, idle times, cost elements, and work unit completion duration are optimization objectives.…”

Section: Repetitive Scheduling For Modular Construction On-site Workmentioning

confidence: 99%

“…Production rate refers to the productivity of a particular crew and can be adjusted through crew size and crew allocation strategies (Moselhi and El-Rayes 1993;Fan, Sun, and Wang 2012). This adjustment helps optimize the work schedule (Altuwaim and El-Rayes 2018;Carr and Meyer 1974;Chrzanowski and Johnston 1986;Ioannou and Yang 2016;Ipsilandis 2006;Lee et al 2015;Nassar 2011;Reda 1990;Salama and Moselhi 2019;Zou et al 2016). These studies used a single work zone is used for repetitive work, also called a work unit.…”

Section: Introductionmentioning

confidence: 99%

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Multiple work zone strategy for repetitive on-site work of modular construction using parallel station method

Hyun

Jung

Yoon

et al. 2020

Journal of Asian Architecture and Building Engineering

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Modular construction offers benefits such as high quality, low cost, and short durations owing to the high productivity of repetitive production. To maximize productivity, modular construction involves repetitive schedules; however, the scheduling methods exhibit limitations when applied to on-site work. These methods are optimized by adjusting the production rate of activities; however, the bounds of the production rates of modular construction on-site work are limited because of workspace limitations in the units and varying amounts of work between activities. This results in idling time in the scheduling methods. Thus, in this research, the parallel station method (PSM) was employed to ensure a flexible production rate. A discrete event simulation model was developed and employed to estimate the number of workers and work duration. The results demonstrated the following: 1) The developed scheduling method exhibits better results than the method for stick-built construction. 2) When applying the PSM, the line-of-balance method is cost-effective, while the TACT method is time-effective, implying that scheduling methods should be selected based on the primary objectives of modular projects. The findings of this research will contribute toward improving the accuracy and applicability of repetitive scheduling methods and reduce the labor cost and duration of onsite work.

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Section: Repetitive Scheduling For Modular Construction On-site Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiple work zone strategy for repetitive on-site work of modular construction using parallel station method

Hyun

Jung

Yoon

et al. 2020

Journal of Asian Architecture and Building Engineering

View full text Add to dashboard Cite

show abstract

“…(2) If we replace the objective function (1) with the one stated in (9), where is the direct cost of activity for employing = 1, . .…”

Section: Model Formulationmentioning

confidence: 99%

“…However, a strict compliance with work continuity by preventing all crews from having interruptions may lead to a longer overall project duration [4]. In recent decades, numerous researches began to focus on repetitive projects scheduling with work interruptions [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A Biobjective Optimization Model for Deadline Satisfaction in Line-of-Balance Scheduling with Work Interruptions Consideration

Zou

Zhang

2018

Mathematical Problems in Engineering

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The line-of-balance (LOB) technique has demonstrated many advantages in scheduling repetitive projects, one of which is that it allows more than one crew to be hired by an activity concurrently. The deadline satisfaction problem in LOB scheduling (DSPLOB) aims to find an LOB schedule such that the project is completed within a given deadline and the total number of crews is minimized. Previous studies required a strict application of crew work continuity, which may lead to a decline in the competitiveness of solutions. This paper introduces work interruptions into the DSPLOB and presents a biobjective optimization model that can balance the two conflicting objectives of minimizing the total number of crews and maximizing work continuity. An efficient version of the ϵ-constraint method is customized to find all feasible tradeoff solutions. Then, these solutions are further improved by an automated procedure to reduce the number of interruptions for each activity without deteriorating the performance in both the objectives. The effectiveness and practicability of the proposed model are verified using a considerable number of instances. The results show that introducing work interruptions provides more flexibility in reducing the total number of crews under the LOB framework, especially for serial projects with a tight deadline constraint.

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“…Schedule management concentrates on the processes that are essential to appropriately deliver critical project aspects, such as time, cost, resources, etc. [2] Scheduling methods which are used to establish reliable construction plans can be broadly classified into exact [3][4][5][6], heuristic [7][8][9], or metaheuristic approaches [10][11][12][13][14]. Current practices in the domain of construction planning and scheduling are oriented towards automatic schedule development and the application of specialized optimization techniques [15].…”

Section: Introductionmentioning

confidence: 99%

Resilient Scheduling as a Response to Uncertainty in Construction Projects

2021

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Complex construction projects are developed in a dynamic environment, where uncertainty conditions have a great potential to affect project deliverables. In an attempt to efficiently deal with the negative impacts of uncertainty, resilient baseline schedules are produced to improve the probability of reaching project goals, such as respecting the due date and reaching the expected profit. Prior to introducing the resilient scheduling procedure, a taxonomy model was built to account for uncertainty sources in construction projects. Thence, a multi-objective optimization model is presented to manage the impact of uncertainty. This approach can be described as a complex trade-off analysis between three important features of a construction project: duration, stability, and profit. The result of the suggested procedure is presented in a form of a resilient baseline schedule, so the ability of a schedule to absorb uncertain perturbations is improved. The proposed optimization problem is illustrated on the example project network, along which the probabilistic simulation method was used to validate the results of the scheduling process in uncertain conditions. The proposed resilient scheduling approach leads to more accurate forecasting, so the project planning calculations are accepted with increased confidence levels.

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Mixed-Integer Linear Programming Approach for Scheduling Repetitive Projects with Time-Cost Trade-Off Consideration

Cited by 25 publications

References 11 publications

Multiple work zone strategy for repetitive on-site work of modular construction using parallel station method

Multiple work zone strategy for repetitive on-site work of modular construction using parallel station method

A Biobjective Optimization Model for Deadline Satisfaction in Line-of-Balance Scheduling with Work Interruptions Consideration

Resilient Scheduling as a Response to Uncertainty in Construction Projects

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