Research on collaborative task assignment method of assembly line

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Weilei Shen ◽  
Qiangqiang Jiang ◽  
Yang Yang
Keyword(s):  
Assembly Line ◽  
Task Assignment ◽  
Allocation Scheme ◽  
Production Lines ◽  
Task Selection ◽  
Content Type ◽  
Line Balance ◽  
Collaborative Task ◽  
Assignment Method ◽  
Assignment Model

Purpose The purpose of this paper is to construct a task assignment model for U-shaped production lines with collaborative task, which is optimized by minimizing the number of workers and balancing the workload of the operators. The ultimate goal is to increase productivity by increasing the U-line balance and balancing the load on the operators. Design/methodology/approach First, task selection and update mechanism are analyzed and the task selection mechanism suitable for collaborative task is proposed. Second, M-COMOSAL is obtained by improving the original COMOSAL. Finally, The M-COMOSAL algorithm and the COMAOSAL algorithm are used to perform job assignment on the double-acting clutch U-shaped assembly line. Findings According to the allocation scheme obtained by M-COMSOAL, the beat can be adjusted according to the change of order demand. The final allocation scheme is superior to the COMSOAL algorithm in terms of number of workers, working time, production tempo and balance rate. In particular, compared with the old scheme, the new scheme showed a decrease of 16.7% in the number of employees and a 18.8% increase in the production line balance rate. Thus, the method is helpful to reduce the number of operators and balance the workload. Originality/value The new algorithm proposed in this paper for the assignment of collaborative task can minimize the number of workers and balance the load of operators, which is of great significance for improving the balance rate of U-shaped production lines and the utilization of personnel or equipment.

A multi-manned assembly line balancing problem with classified teams: a new approach

2016 ◽  
Vol 36 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Hamid Yilmaz ◽  
Mustafa Yilmaz
Keyword(s):  
Design Methodology ◽  
Assembly Line ◽  
Assembly Line Balancing ◽  
Line Balancing ◽  
Test Problems ◽  
New Approach ◽  
Content Type ◽  
Line Test ◽  
Assembly Line Balancing Problem ◽  
First Time

Purpose – Within team-oriented approaches, tasks are assigned to teams before being assigned to workstations as a reality of industry. So it becomes clear, which workers assemble which tasks. Design/methodology/approach – Team numbers of the assembly line can increase with the number of tasks, but at the same time, due to physical situations of the stations, there will be limitations of maximum working team numbers in a station. For this purpose, heuristic assembly line balancing (ALB) procedure is used and mathematical model is developed for the problem. Findings – Well-known assembly line test problems widely used in the literature are solved to indicate the effectiveness and applicability of the proposed approach in practice. Originality/value – This paper draws attention to ALB problem in which workers have been assigned to teams in advance due to the need for specialized skills or equipment on the line for the first time.

scholarly journals IMPROVING THE RELIABILITY OF BODY ASSEMBLY LINE EQUIPMENT

1996 ◽  
Vol 03 (01) ◽  
pp. 11-24 ◽  
Author(s):  
KAKURO AMASAKA ◽  
HIROHISA SAKAI
Keyword(s):  
Conventional Method ◽  
Assembly Line ◽  
Failure Modes ◽  
Lead Times ◽  
Reliability Engineering ◽  
Production Lines ◽  
Line Production ◽  
Equipment Reliability ◽  
New Models ◽  
Short Time

It is necessary to establish higher levels of equipment reliability in a short time, the market demands ever shorter lead times for the release of new models. Also, the demand for new-model cars is very strong immediately after their introduction. The conventional method for enhancing equipment reliability is by screening alone. However, this requires screening operations on production lines and so has been an obstacle to line production and prevented shortening of lead times. We are now able to dramatically enhance equipment reliability in a very short time by detecting failure modes and forecasting the number of occurrences using a scientific technique based on reliability engineering.

A self-organized reciprocal control method for multi-robot simultaneous coverage and tracking

2018 ◽  
Vol 38 (5) ◽  
pp. 689-698 ◽  
Author(s):  
Runfeng Chen ◽  
Jie Li ◽  
Lincheng Shen
Keyword(s):  
Control Method ◽  
Task Assignment ◽  
Decision Time ◽  
Velocity Space ◽  
Deadweight Loss ◽  
Traffic Surveillance ◽  
Content Type ◽  
Optimal Velocity ◽  
Service Environment ◽  
Self Organized

Purpose Multi-robots simultaneously coverage and tracking (SCAT) is the problem of simultaneously covering area and tracking targets, which is essential for many applications, such as delivery service, environment monitor, traffic surveillance, crime monitor, anti-terrorist mission and so on. The purpose of this paper is to improve the performance of detected target quantity, coverage rate and less deadweight loss by designing a self-organized method for multi-robots SCAT. Design/methodology/approach A self-organized reciprocal control method is proposed, coupling task assignment, tracking and covering, equipped with collision-avoiding ability naturally. First, SCAT problem is directly modeled as optimal reciprocal coverage velocity (ORCV) in velocity space. Second, the preferred velocity is generated by calculating the best velocity to the center of some robot detected targets. ORCV is given by adjusting the velocity relative to neighbor robots’ toward in optimal coverage velocity (OCV); it is proven that OCV is collision-free assembly. Third, some corresponding algorithms are designed for finding optimal velocity under two situations, such as no detected targets and empty ORCV. Findings The simulation results of two cases for security robots show that the proposed method has detected more targets with less deadweight loss and decision time and no collisions anytime. Originality/value In this paper, a self-organized reciprocal control method is proposed for multi-robots SCAT problem, which is modeled in velocity space directly, different to the traditional method modeling in configuration space. What is more, this method considers the reciprocal of robots that contributes to the better accomplishment of SCAT cooperatively.

scholarly journals Combining an Extended SMAA-2 Method with Integer Linear Programming for Task Assignment of Multi-UCAV under Multiple Uncertainties

Symmetry ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 587 ◽  
Author(s):  
Jun Wang ◽  
Pengcheng Luo ◽  
Xinwu Hu ◽  
Xiaonan Zhang
Keyword(s):  
Linear Programming ◽  
Integer Linear Programming ◽  
Programming Model ◽  
Task Assignment ◽  
Target Information ◽  
Interval Numbers ◽  
Weighted Arithmetic ◽  
Assignment Model ◽  
Arithmetic Averaging Operator ◽  
Multiple Uncertainties

Uncertainty should be taken into account when establishing multiobjective task assignment models for multiple unmanned combat aerial vehicles (UCAVs) due to errors in the target information acquired by sensors, implicit preferences of the commander for operational objectives, and partially known weights of sensors. In this paper, we extend the stochastic multicriteria acceptability analysis-2 (SMAA-2) method and combine it with integer linear programming to achieve multiobjective task assignment for multi-UCAV under multiple uncertainties. We first represent the uncertain target information as normal distribution interval numbers so that the values of criteria (operational objectives) concerned can be computed based on the weighted arithmetic averaging operator. Thus, we obtain multiple criteria value matrices for each UCAV. Then, we propose a novel aggregation method to generate the final criteria value matrix based on which the holistic acceptability indices are computed by the extended SMAA-2 method. On this basis, we convert the task assignment model with uncertain parameters into an integer linear programming model without uncertainty so as to implement task assignment using the integer linear programming method. Finally, we conduct a case study and demonstrate the feasibility of the proposed method in solving the multiobjective task assignment problem multi-UCAV under multiple uncertainties.

scholarly journals Assignment model with multi-objective linear programming for allocating choice ranking using recurrent neural network

2021 ◽  
Author(s):  
Zahra Sadat Mirzazadeh ◽  
Javad Banihassan ◽  
Amin Mansoori
Keyword(s):  
Neural Network ◽  
Linear Programming ◽  
Recurrent Neural Network ◽  
Absolute Priority ◽  
Multi Objective ◽  
Assignment Method ◽  
Assignment Model ◽  
Decision Attributes ◽  
Linear Programming Problems ◽  
Linear Assignment

Classic linear assignment method is a multi-criteria decision-making approach in which criteria are weighted and each rank is assigned to a choice. In this study, to abandon the requirement of calculating the weight of criteria and use decision attributes prioritizing and also to be able to assign a rank to more than one choice, a multi-objective linear programming (MOLP) method is suggested. The objective function of MOLP is defined for each attribute and MOLP is solved based on absolute priority and comprehensive criteria methods. For solving the linear programming problems we apply a recurrent neural network (RNN). Indeed, the Lyapunov stability of the model is proved. Results of comparing the proposed method with TOPSIS, VICOR, and MOORA methods which are the most common multi-criteria decision schemes show that the proposed approach is more compatible with these methods.

Impressions in action: the socially situated construction of expertise in the workplace

2015 ◽  
Vol 4 (1) ◽  
pp. 44-63 ◽  
Author(s):  
Aditya Johri
Keyword(s):  
Impression Formation ◽  
Task Assignment ◽  
Ethnographic Study ◽  
Knowledge Generation ◽  
Task Completion ◽  
Content Type ◽  
Using Data ◽  
Workplace Setting ◽  
Socially Situated

Purpose – The impressions of others’ expertise are fundamental to workplace dynamics. Identifying expertise is essential for workplace functions such as task assignment, task completion, and knowledge generation. Although prior work has examined both the nature of expertise and its importance for work, formation of expertise impressions in the workplace has not received much attention. The paper aims to discuss these issues. Design/methodology/approach – In this paper the author addresses the question – how do we form expertise impressions in the workplace – using data from an ethnographic study of a workplace setting. The author employs a case study of project team formation to synthesize a process framework of impression formation. Findings – The author proposes a framework that integrates sociocultural and interactional accounts to argue that actors utilize situational and institutional frames to socially construct their expertise impressions of others. These frames emerge as actors engage in activities within a community of practice. Originality/value – This practice-based explication of expertise construction moves beyond narrow conceptions of personality-based traits or credentials as signals of expertise. It explains why sharing of expertise within organizations through the use of information technology continues to be problematic – expertise is an enactment and therefore it defies reification through knowledge management.

A Task Assignment Method Considering Inclusiveness and Activity Degree

2018 ◽  
Author(s):  
Hirotaka Hashimoto ◽  
Masaki Matsubara ◽  
Yuhki Shiraishi ◽  
Daisuke Wakatsuki ◽  
Jianwei Zhang ◽  
...  
Keyword(s):  
Task Assignment ◽  
Assignment Method

Assessing batteries supply chain networks for low impact vehicles

2020 ◽  
Vol 14 (1) ◽  
pp. 148-171
Author(s):  
Carlo Rafele ◽  
Giulio Mangano ◽  
Anna Corinna Cagliano ◽  
Antonio Carlin
Keyword(s):  
Supply Chain ◽  
Human Resource ◽  
Design Methodology ◽  
Hybrid Vehicles ◽  
Production Lines ◽  
Content Type ◽  
Supply Chain Networks

Purpose This paper aims to evaluate different logistics configuration to deliver batteries from the supplier to the production lines of a European carmaker who is implementing new propulsions for its models. Design/methodology/approach Several scenarios about the supply chain for traction batteries have been identified based on the company’s requirements and constraints. Then, the variables used for the assessment of each scenario have been selected to calculate the unit battery supply chain cost. Findings The results underline that a direct transport without intermediate nodes is the cheapest one. On the contrary, an additional warehouse makes the organization of the network more complex. However, with this configuration, it is possible to cover the risk of supply since that a certain level of inventory is always guaranteed. Research limitations/implications This study is limited to the analysis of only one model car, and just manual operations have been taken into account for computing the human resource time and cost. The present study is one of the first works exploring the organization of the supply chain for the batteries integrated in electric and hybrid vehicles together with the choice of the location of the related warehouses. Originality/value This paper is one of the first work on the assessment of batteries’ supply chain that are going to be integrated in low impact vehicles, focusing on location of the associated warehouse. The evaluation is carried out by taking into account all the sources of cost.

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