A new when-to-schedule policy in online scheduling based on cumulative task delays

Suwa, Haruhiko

doi:10.1016/j.ijpe.2007.02.015

Cited by 21 publications

(5 citation statements)

References 18 publications

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“…Rescheduling procedure may be implemented periodically or in reaction to an unexpected event that causes a serious disruption [26].…”

Section: Risk-aware Scheduling Conceptsmentioning

confidence: 99%

Proactive-reactive repetitive project scheduling method – the concept of risk consideration at the project planning and execution stage

2023

Archives of Civil Engineering

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The construction contractor is concerned with reducing the cost of the project, including reducing unnecessary downtime. This is achieved when resources are fully utilized; this means the crews work continuously moving without interruption from one location to the other. However, any disturbance in the optimally scheduled workflow caused by random events is likely to result in delays, interruptions in the crews work, and productivity losses. There is therefore a need for scheduling methods that allow plans to be more resilient to disruptions and ensure a reduction in downtime and implementation costs. The authors put forward a proactive-reactive approach to the schedule risk management. Proposed method makes it possible to protect schedule deadlines from the impact of risk factors by allocating time buffers (proactive approach). It also takes into account the measures that managers take during execution in response to delays that occur, such as changing construction methods, employing extra resources, or working overtime (reactive approach). It combines both ideas and is based on project simulation technique. The merits of the proposed approach are illustrated by a case of a repetitive project to erect a number of buildings. The presented example proves that the proposed method enables the planner to estimate the scale of delays of processes' start and consider the impact of measures to reduce duration of processes in particular locations taken in reaction to delays. Thus, it is possible to determine the optimal schedule, at which the costs of losses associated with delays and downtime are minimal.

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“…Rescheduling procedure may be implemented periodically or in reaction to an unexpected event that causes a serious disruption [26].…”

Section: Risk-aware Scheduling Conceptsmentioning

confidence: 99%

Proactive-reactive repetitive project scheduling method – the concept of risk consideration at the project planning and execution stage

2023

Archives of Civil Engineering

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“…Only limited researches explore the impacts of disruptions on re-scheduling in the production process. Suwa [25] proposed a re-scheduling policy for the single-machine system. The rescheduling would be implemented when the cumulative task delay caused by unexpected events exceeded a predetermined threshold, and the current schedule was always modified at the planned times.…”

Section: Real-time Control Of the Production Processmentioning

confidence: 99%

“…The link between the extent of disruptions and the decision-making process of assembly line re-balancing is examined by only a few researches. Suwa [25] and Valledor et al [26] proposed the periodic re-scheduling policy, and whether to implement re-scheduling was determined based on the condition at the predetermine inspection times. However, the effectiveness of such policies would inevitably depend on the predetermined inspection interval, and the real-time decision-making was not possible.…”

Section: Introductionmentioning

confidence: 99%

Intelligent workload balance control of the assembly process considering condition-based maintenance

Huo

Lee

2021

Advanced Engineering Informatics

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“…The accumulation of delays results in lowering the productivity of the manufacturing system. In [7] rescheduling is considered as a measure to reduce the delays.…”

Section: Modelling Decision Making Duration Time and Cumulative Delaymentioning

confidence: 99%

Cyber-Physical Production System (CPPS) decision making duration time impact on manufacturing system performance

Alveš¹,

Putnik²

2019

FME Transactions

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Cyber-Physical Production Systems (CPPS) are inherent to i4.0 to enhance actual manufacturing system control and management processes, and, consequently, the decision making process. This paper presents research on the influence of decision making duration time in CPPS on manufacturing system performance, for different scheduling paradigms. Different scenarios were investigated considering different decision making duration times and different variations of the environement dynamics. Results show that with the increase of the decision making duration time, the completion time of the jobs given at the input, as one of the principal manufacturing system performance measures, increases. Also, considering stable environments, the completion time variation growth in function of CPPS decision making duration time is approximately linear, while when considering dynamic environments, completion time variation growth in the function of CPPS decision making duration time is nonlinear.

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A new when-to-schedule policy in online scheduling based on cumulative task delays

Cited by 21 publications

References 18 publications

Proactive-reactive repetitive project scheduling method – the concept of risk consideration at the project planning and execution stage

Proactive-reactive repetitive project scheduling method – the concept of risk consideration at the project planning and execution stage

Intelligent workload balance control of the assembly process considering condition-based maintenance

Cyber-Physical Production System (CPPS) decision making duration time impact on manufacturing system performance

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