scholarly journals A Districting Application with a Quality of Service Objective

Mathematics ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 13
Author(s):  
Eduardo Álvarez-Miranda ◽  
Jordi Pereira

E-commerce sales have led to a considerable increase in the demand for last-mile delivery companies, revealing several problems in their logistics processes. Among these problems, are not meeting delivery deadlines. For example, in Chile, the national consumer service (SERNAC) indicated that in 2018, late deliveries represented 23% of complaints in retail online sales and were the second most common reason for complaints. Some of the causes are incorrectly designed delivery zones because in many cases, these delivery zones do not account for the demographic growth of cities. The result is an imbalanced workload between different zones, which leads to some resources being idle while others fail to meet their workload in satisfactory conditions. The present work proposes a hybrid method for designing delivery zones with an objective based on improving the quality of express delivery services. The proposed method combines a preprocess based on the grouping of demand in areas according to the structure of the territory, a heuristic that generates multiple candidates for the distribution zones, and a mathematical model that combines the different distribution zones generated to obtain a final territorial design. To verify the applicability of the proposed method, a case study is considered based on the real situation of a Chilean courier company with low service fulfillment in its express deliveries. The results obtained from the computational experiments show the applicability of the method, highlighting the validity of the aggregation procedure and improvements in the results obtained using the hybrid method compared to the initial heuristic. The final solution improves the ability to meet the conditions associated with express deliveries, compared with the current situation, by 12 percentage points. The results also allow an indicative sample of the critical service factors of a company to be obtained, identifying the effects of possible changes in demand or service conditions.

2021 ◽  
Vol 13 (8) ◽  
pp. 4302
Author(s):  
Justyna Lemke ◽  
Kinga Kijewska ◽  
Stanisław Iwan ◽  
Tomasz Dudek

A city as a system that constitutes one of the most important areas of human activities. The significant role to fulfill their expectations pay the goods transport and deliveries. These issues are the subject of urban logistics. In broad terms, urban logistics may be construed as a number of processes focused on freight flows, which are completed in cities, including deliveries, supply, goods transfer, services, etc. Due to the different urban logistics stakeholders’ expectations, these systems generate many challenges for managers, especially in the context of city users’ needs and their quality of life. Today, there is a lack of broadened approach and methodology to support them from the processes’ efficiency perspective. To fulfill this gap, the purpose of this paper is to apply the Six Sigma method as a support in last mile delivery management. Six Sigma method plays important role in production systems processes management. However, it could be useful in much wider perspective, including transport and logistics processes. The Authors emphasize that the Six Sigma method could be efficient approach in the last mile delivery processes’ analysis in the context of their efficiency. It helps positioning the customer satisfaction level and quantify the delivery processes defects, related to the undelivered goods. Following that it could improve significantly the last mile delivery processes efficiency. The concept is illustrated by a sample evaluation of one of the urban logistics processes: completion of deliveries. To this end, urban logistics processes were defined. In particular, the delivery completion process was mapped, and the process client was defined along with their expectations. The defects that occurred in the process were identified and analyzed. A DPMO (Defect per Million Opportunities) indicator was established for three randomly selected months. In addition, a root cause analysis of errors was performed. The sigma level for the studied process ranged from 2.61 to 2.89. The factor that had the greatest impact on the number of defects defined as failed deliveries was customer’s absence. The obtained results indicate that the delivery process should be examined in more detail.


2019 ◽  
Vol 65 (2) ◽  
pp. 21-29
Author(s):  
Ana Jurić ◽  
Aleksandra Zupanc ◽  
Tjaša Štrukelj

AbstractThe central aim of the article is company governance, i.e., researching governance of a company that does not want to be only financially successful but also direct its governance toward socially responsible governance. The article begins with the definition of “theoretical backgrounds,” in which social responsibility in regard to company governance improvement in quality is explained. The article then focuses on the measurement of the quality of company governance; in the research, the selected tool chosen to evaluate the governance of the chosen company regarding social responsibility, i.e., SEECGAN index, is used. Further, the case study of a Slovenian public limited liability company is used. One of the important research findings is the recognition that the addressed part of the SEECGAN index needs to be innovated and further developed. Additional questions for the completion of the index used presents the added value of the article. This article has two limitations: 1) it focuses only on the tool chosen to evaluate the governance of the chosen company regarding social responsibility; 2) the case study is based on publicly accessible data.


Author(s):  
Cláudio César Vasconcelos Barros ◽  
Jonas Gomes da Silva

The article evaluated the control of Stencil in the subprocess of Printing of the SMD line of a company located in the Industrial Pole of Manaus (PIM), to provide subsidies to develop a computerized system. With computerization, the focus of employees will be directed to the activities of production and quality of manufactured products, also, the collection of process data, done in real-time, will allow managers to better monitor and take actions in the process. To this end, a case study, bibliographic research of articles, dissertations, and theses involving the theme, and documentary research (forms, records, etc.) with the sectors involved were used. The descriptive statistics method was applied, quality tools were used, aimed at identifying and solving problems such as PDCA, Pareto, Ishikawa Diagram, flow chart, and 5W2H. A study of the activities related to the control of the Stencil was carried out, of the documentation used in the process, as well as of the factors and causes related to the effective Stencil control. Among the results, 24 causes affect the performance of the Stencil control, concluding that the main failures were human, due to the prioritization of production goals by the employees, leaving the other activities in the background, which is why the 24 guidelines proposed for the computerization of this process become relevant, some of which are: defining means to identify each Stencil using a bar code or QR code; do not allow the use of the Stencil if one of the activities unfinished in the process; stop production when an activity is not performed; digitize the documents used in this process; create an automatic notification to those responsible, when an action is necessary, etc.


IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Chia-Nan Wang ◽  
Ngoc-Ai-Thy Nguyen ◽  
Thanh-Tuan Dang ◽  
Hsien-Pin Hsu

2015 ◽  
Vol 44 (2) ◽  
pp. 117-123 ◽  
Author(s):  
Md. Mahbubur Rahman ◽  
Farjana Nur ◽  
Subrata Talapatra

For every manufacturing organization, price of the product primarily comprises of manufacturing cost and desired profit. If a company wishes to increase its profit, one way is to reduce the manufacturing cost with maintaining the quality of the product. Waste reduction, especially the (wait) time waste, is an important factor to shrink the manufacturing cost. The purpose of this paper is to identify and address the way to reduce idle time in the apparel manufacturing organization using various line balancing technique to improve productivity and efficiency in domestic context. Line balancing job has been done through the ‘Largest Candidate Rule’ and ‘Ranked Positional Weight Technique’. Using these techniques, a software has been developed to arrange the elemental tasks in the workstation, and to show the balancing efficiencies of each method and other important information. The overall job may be very helpful in some decision making process of the organization. At last an efficient and balanced line has been proposed through the study.


2018 ◽  
Vol 15 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Taciana De Barros Jerônimo ◽  
Fagner José Coutinho de Melo ◽  
Joás Tomaz de Aquino ◽  
André Philippi Gonzaga de Albuquerque ◽  
Denise Dumke de Medeiros

This article aims to analyze the characteristics of a community of practice focused on the quality of management decision making in a company in the metallurgical industry, which is a company of cutting and bending steel for construction. Quality management requires greater flexibility in the activities, information sharing, skills development of individuals, and engagement among employees. The scientific method adopted was the descriptive cross-analysis case study, whose data was collected through semi-structured interviews conducted with 180 individuals. It was observed that the creation of communities of practice does not occur at random, and its main features are defined identity of shared interest; the way to build the image belonging to a particular social group; and involvement in joint activities that allow them to learn from each other.


2021 ◽  
Vol 18 ◽  
pp. 703-711
Author(s):  
Yuh‐Jen Cho ◽  
Lin Xue ◽  
Shu-Rong Huang ◽  
Zhe-Peng Yang

The backward last-mile delivery infrastructures, the greater difficulties in last-mile delivery due to the scattered residences of rural customers and the lack of logistics professionals in rural areas have emerged as the important factors hindering the improvement of the service quality of last-mile delivery in rural areas. This study combines the classic satisfaction index model and transformation of the SERVQUAL standard scale to draw up the connotations and observation variables of customer expectations, quality perception, perceived value, customer satisfaction, customer complaints and customer loyalty with the service quality of last-mile delivery in rural areas, and takes 460 permanent residents in rural areas as the research objects, then constructs and tests the customer satisfaction model of the service quality of last-mile delivery in rural areas, and deeply analyzes the relationship between customer satisfaction and its influencing factors; by constructing a twodimensional combination potential of entropy weight-satisfaction average value, the in-depth application of the model is discussed, and at the same time, it provides policy suggestions for local governments, logistics companies and other entities to improve the customer satisfaction with the service quality of last-mile delivery in rural areas


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