The application of time coupling methods in the engineering

Rogalska, Magdalena; Hejducki, Zdzisław

doi:10.4467/2353737xct.17.148.7160

Cited by 4 publications

(6 citation statements)

References 6 publications

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“…The effectiveness of this type of organization will largely depend on the extent to which the project manager is able to enter the negotiation process with all the participants. The effectiveness of the focal type of NOS is determined from the ratio: (1) where F0 is the potential effectiveness of NOS, which is determined only by its structural scheme; k1 is a coverage ratio, which determines the correlation between the number of conducted and completed negotiations l and the total number of requests n ,…”

Section: Methodsmentioning

confidence: 99%

“…Carrying out construction projects in modern conditions is connected with a number of difficulties. Some of them are related to solving problems of resource and time planning [1,2]. During an implementation of a construction project, the attention is focused on a resource organization and monitoring the implementation of tasks, any deviations from the plan and on corrective influence that can be taken.…”

Section: Introductionmentioning

confidence: 99%

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Archives of Civil Engineering

Trach

Połoński

Hrytsiuk

2021

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Recent research has shown that the increase in a number of participants of construction project elevated the cost and duration of construction. The use of integrated project delivery and the formation of a network organization structure can significantly reduce the costs, as the activities of the participants become more coherent and coordinated. The optimization of decisions is essential for the efficiency of a negotiation process, which in turn depends on the organizational structure. The article specifies three basic types of network organizational structure that can be applied in a construction project: focal (F1), dynamic (F2), multifocal (F3). In this study, a direct assessment of possible effectiveness of each of the three types of network organizational structures was carried out using a vector decision model. For each of the above-mentioned types of organizational structures, the potential effectiveness of negotiating act f0 and the total potential effectiveness F0 was calculated. The results of the study show that the most effective type of network organizational structure is the multifocal collective decisions in which a project manager has several "assistants".

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Archives of Civil Engineering

Trach

Połoński

Hrytsiuk

2021

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“…These models are usually of a deterministic or random approach. The most common methods of planning construction work (scheduling projects) are, e.g., CPM/PERT network planning (Critical Path Method/Program Evaluation and Review Technique) [37], Line of Balance (LOB) [1], methods based on LOB, such as the LSM (Linear Scheduling Model) or RSM (Repetitive Scheduling Method) [2], and Time Couplings Methods TCM [38].…”

Section: Schedule Optimization For Multi-unit Construction Projectsmentioning

confidence: 99%

The Impact of the Learning and Forgetting Effect on the Cost of a Multi-Unit Construction Project with the Use of the Simulated Annealing Algorithm

2022

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Construction projects are often delayed. Their budgets are being exceeded. This is partly because construction project models rarely take human factors into account. The article focuses on the repetitive multi-unit projects that are often found in construction practices. They are an excellent example of construction works for which the optimization of certain processes can bring measurable financial benefits. In particular, the focus was on improving the key investment success indicator, the total cost of a project. This article presents the use of learning and forgetting phenomenon to improve construction schedules. The authors proposed an innovative model of the construction phase and optimized the schedule using a proprietary calculation algorithm using the simulated annealing phenomenon. The method was verified by a series of experiments and showcased by a case study. The results show that the presented methods can improve the construction planning process and better reflect the current construction conditions. The findings may impact residential, infrastructure, industrial, and commercial construction branches.

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“…Constraint (3) ensures that the processing of jobs is not interrupted. Due to constraint (4), a job is completed on machine a − 1 before it starts processing on machine a (enforcing compliance with the technological process).…”

Section: Problem Formulationmentioning

confidence: 99%

“…For several decades, scheduling and job scheduling have received constant attention from both researchers and practitioners from across the world. Such a level of interest is justified by the broad applications of scheduling which go from production planning and manufacturing [1,2], construction [3], cloud computing [4,5], transportation [6], education [7], healthcare [8] to CPUs [9], Internet of Things [10] and sensor networks [11]. Moreover, many scheduling problems are NP-hard, increasing the importance of developing faster and more efficient solving methods for scheduling problems with real-life instance sizes.…”

Section: Introductionmentioning

confidence: 99%

Parallel Makespan Calculation for Flow Shop Scheduling Problem with Minimal and Maximal Idle Time

Rudy

2021

Applied Sciences

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In this paper, a flow shop scheduling problem with minimal and maximal machine idle time with the goal of minimizing makespan is considered. The mathematical model of the problem is presented. A generalization of the prefix sum, called the job shift scan, for computing required shifts for overlapping jobs is proposed. A work-efficient algorithm for computing the job shift scan in parallel for the PRAM model with n processors is proposed and its time complexity of O(logn) is proven. Then, an algorithm for computing the makespan in time O(mlogn) in parallel using the prefix sum and job shift scan is proposed. Computer experiments on GPU were conducted using the CUDA platform. The results indicate multi-thread GPU vs. single-thread GPU speedups of up to 350 and 1000 for job shift scan and makespan calculation algorithms, respectively. Multi-thread GPU vs. single-thread CPU speedups up to 4.5 and 14.7, respectively, were observed as well. The experiments on the Taillard-based problem instances using a simulated annealing solving method and employing the parallel makespan calculation show that the method is able to perform many more iterations in the given time limit and obtain better results than the non-parallel version.

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The application of time coupling methods in the engineering

Abstract: This paper summarises methods of scheduling construction processes with the use of artificial intelligence methods. Rules used for the calculation are characterised taking into account the implementation of priorities and resource constraints.

Cited by 4 publications

References 6 publications

Archives of Civil Engineering

Archives of Civil Engineering

The Impact of the Learning and Forgetting Effect on the Cost of a Multi-Unit Construction Project with the Use of the Simulated Annealing Algorithm

Parallel Makespan Calculation for Flow Shop Scheduling Problem with Minimal and Maximal Idle Time

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