eng
Poznan School of Logistics
Logforum
1734459X
2016-09-30
12
3
article
Fuzzy economic production quantity model with time dependent demand rate
Susanta Kumar Indrajitsingha
1
Sudhansu Sekhar Routray
2
Susanta Kumar Paikray
3
Umakanta Misra
4
Berhampur University, Odisha, India
Ravenshaw University, Cuttack, Odisha, India
VSSUT, Burla, Odisha, India
NIST, Golanthara, Berhampur, Odisha, India
Background: In this paper, an economic production quantity model is considered under a fuzzy environment. Both the demand cost and holding cost are considered using fuzzy pentagonal numbers. The Signed Distance Method is used to defuzzify the total cost function.
Methods: The results obtained by these methods are compared with the help of a numerical example. Sensitivity analysis is also carried out to explore the effect of changes in the values of some of the system parameters.
Results and conclusions: The fuzzy EPQ model with time dependent demand rate was presented together with the possible implementation. The behavior of changes in parameters was analyzed. The possible extension of the implementation of this method was presented.
http://www.logforum.net/vol12/issue3/no1/12_3_1_16.pdf
Inventory
Pentagonal Fuzzy Number
Signed Distance Method
eng
Poznan School of Logistics
Logforum
1734459X
2016-09-30
12
3
article
Fuzzy logic-decision-making system dedicated to evaluation of logistics project effectiveness
Iwona Pisz
1
Iwona Łapuńka
2
Opole University, Opole, Poland
Opole University of Technology, Opole, Poland
Background: Project effectiveness is synonymous with project success. It is measured or assessed in terms of the degree to which project objectives are achieved. This paper presents an approach to evaluating the effectiveness of logistics projects. The starting point is the analysis of the current state of knowledge in the area of assessing project effectiveness, including logistics projects. The purpose of the study was to identify the critical factors determining the success of logistics projects and develop a model of logistics project effectiveness.
Methods: The paper is based on the available recent scientific-theoretical research and publica
http://www.logforum.net/vol12/issue3/no2/12_3_2_16.pdf
project
logistics project
performance
effectiveness
efficiency
project success
fuzzy decision-making system
fuzzy logic
MATLAB software system
eng
Poznan School of Logistics
Logforum
1734459X
2016-09-30
12
3
article
Enterprises\' readiness to establish and develop collaboration in the area of logistics
Marcin Świtała
1
University of Economics in Katowice, Poland
Background: Despite the large number of studies on various aspects and forms of supply chain collaboration, the issue is still classified as a relatively poorly recognized research problem in the logistics field. This article is crucial in the discussion on the further directions for the development of cross-organizational collaboration. The main objective of these studies was to assess the readiness of companies to start and develop vertical and horizontal collaboration within logistics.
Methods: The research problem was analysed on the basis of primary and secondary data sources. Primary research was conducted among manufacturing and trade companies as well as logistics service providers. In the statistical description the Mann-Whitney U test and Wilcoxon test were used. It was assumed that the result was statistically significant for p<0.05.
Results: The results show a high readiness of the companies surveyed for further vertical integration and two variables had a statistically significant effect on the assessment of the respondents, i.e. the current level of integration and the role the respondents played in the supply chain. As far as horizontal cooperation is concerned, the readiness of the companies surveyed for further integration was slightly above the average level. Compared to vertical collaboration, the difference between the average rating was statistically highly significant.
Conclusions: The study indicates the need for the companies surveyed to be involved in logistics collaboration. However, it should be emphasized that the respondents prefer collaboration with companies which do not operate at the same level in the supply chain. As far as horizontal collaboration is concerned, the results can be explained by a number of concerns expressed by the respondents regarding the behavior of potential collaborators. Apparently, in this case, an individual approach with a competitive attitude dominates among the respondents.
http://www.logforum.net/vol12/issue3/no3/12_3_3_16.pdf
logistics collaboration
supply chain collaboration
vertical and horizontal collaboration
eng
Poznan School of Logistics
Logforum
1734459X
2016-09-30
12
3
article
The role of kaizen in creating radical performance results in a logistics service provider
Erez Agmoni
1
Graduate School of Business, Assumption University of Thailand, Bangkok, Thailand
Background: This study investigates the role of an incremental change in organizational process in creating radical performance results in a service provider company. The role of Kaizen is established prominently in manufacturing, but is nascent in service applications. This study examines the impact of introducing Kaizen as an ODI tool-how it is applied, how it works, and whether participants believe it helps service groups form more effective working relationships that result in significant performance improvements.
Methods: Exploring the evolving role of Kaizen in service contexts, this study explores a variety of facets of human communication in the context of continuous improvement and teamwork inter-organizationally. The paper consists of an archival study and an action research case study. A pre-intervention study consisting of observations, interviews, and submission of questionnaires to employees of a manufacturing and air-sea freight firm was conducted. A Kaizen intervention occurred subsequently, and a post-intervention study was then conducted.
Results: Radical improvements in both companies such as 30% financial growth, 81% productivity improvement and more are demonstrated in this paper.
Conclusions: Findings offer unique insights into the effects of Kaizen in creating radical performance improvements in a service company and its customer. Both qualitative and quantitative results of business, satisfaction, and productivity suggest time invested in introducing Kaizen into a service organization helps the companies improve relationships and improve the bottom line dramatically.
http://www.logforum.net/vol12/issue3/no4/12_3_4_16.pdf
Kaizen
continuous improvement
collaboration
service organization
motivation
eng
Poznan School of Logistics
Logforum
1734459X
2016-09-30
12
3
article
Processes of concentration of wholesale trade in poland in the light of empirical research
Szymon Strojny
1
Maria Chromińska
1
Poznan School of Logistics, Poznań, Poland
Background: The increasing role of trade as the integrator of distribution channels has been observed in Poland recently. Retail companies have gained a competitive advantage in relationships with both suppliers and recipients. The natural questions are, how the situation of the wholesale trade looks at present in such a situation and what prospects it has for the future. The main aim of this paper is to identify and describe the influence of new conditions on the development of the wholesale trade as part of the supply chain. The hypothesis was assumed that this development is determined by processes related to the concentration of trade companies, which were also visiblerecently in Poland.
Methods: The main concentration processes in Polish trade were identified based on a literature review and previous research. Then, ba
http://www.logforum.net/vol12/issue3/no5/12_3_5_16.pdf
company
wholesale trade
multichannel trade
omnichannel sale
eng
Poznan School of Logistics
Logforum
1734459X
2016-09-30
12
3
article
Activity of small businesses in the process of building relationships in the supply chain
Waldemar Glabiszewski
1
Nicolaus Copernicus University, Torun, Poland
Background: Multilateral cooperation is an inherent part of any business and one of the most important factors in the success of modern enterprise. Therefore, in this paper the author addresses the problem of building relationships with partners in a supply chain and focuses on the development of relational abilities as well as inter-organizational ties, and his exploration and considerations are applied to small businesses.
Methods: In the empirical part of the work the author aims to identify the scope and intensity of the involvement of small businesses in taking measures to build relationships with supply chain partners. The basic source of data is the results of empirical research conducted by the author in 2014 by means of mail and personal surveys. A questionnaire specially designed for this purpose was sent out to 500 randomly selected small businesses from the kujawsko-pomorskie region (Poland).
Results: The author provides a positive verification of the formulated hypotheses, which imply that small businesses take action to develop both their ability to establish and maintain relationships and the actual relationships with partners in the supply chain. However, they take various activities into account, but not all, and this is mostly done in a manner that is not systematically, particularly in relation to those undertakings which require more sophisticated skills and tools.
Conclusions: Propagating the theory of relational abilities among small businesses and the concepts indicating the forms of their development and use appears to be justified, even if these companies seem to be aware of the impact of the quality of relationships with supply chain partners on the effects of cooperation with them.
http://www.logforum.net/vol12/issue3/no6/12_3_6_16.pdf
inter-organizational relationships
cooperation
relational abilities
supply chain
small businesses
eng
Poznan School of Logistics
Logforum
1734459X
2016-09-30
12
3
article
A framework for an inventory model for deteriorating items with expiration under trapezoidal-type demand and partial backlogging
Kunal T. Shukla
1
Mihir S. Suthar
2
Lukhdhirji Engineering College, Morbi, Gujarat, India
Charotar University of Science and Technology University, Anand, Gujarat, India
Background: As in the case of deteriorating items, expiration plays a major role in inventory management, a generalized approach is studied based on an inventory model for deteriorating items with expiration dates.
Methods: In this paper, the demand rate during the cycle time is assumed to be trapezoidal. Shortages are allowed and partially backlogged. An inventory replenishment strategy is formulated for trapezoidal demand rates and backlogging rates in general for retailers; with the support of fundamental concepts of calculus.
Results: The method is illustrated with the support of numerical examples along with sensitivity analysis with respect to major parameters.
Conclusion: This generalized approach provides a platform to develop a strategy using different demand functions and backlogging rates.
http://www.logforum.net/vol12/issue3/no7/12_3_7_16.pdf
Inventory
deteriorating items with expiration
trapezoidal demand rate
partial backlogging
eng
Poznan School of Logistics
Logforum
1734459X
2016-09-30
12
3
article
Location of airports - selected quantitative methods
Agnieszka Merkisz-Guranowska
1
Maciej Bieńczak
1
Marcin Kiciński
1
Paweł Zmuda-Trzebiatowski
1
Poznan University of Technology, Poznan, Poland
Background: The role of air transport in the economic development of a country and its regions cannot be overestimated. The decision concerning an airport's location must be in line with the expectations of all the stakeholders involved. This article deals with the issues related to the choice of sites where airports should be located.
Methods: Two main quantitative approaches related to the issue of airport location are presented in this article, i.e. the question of optimizing such a choice and the issue of selecting the location from a predefined set. The former involves mathematical programming and formulating the problem as an optimization task, the latter, however, involves ranking the possible variations. Due to various methodological backgrounds, the authors present the advantages and disadvantages of both approaches and point to the one which currently has its own practical application.
Results: Based on real-life examples, the authors present a multi-stage procedure, which renders it possible to solve the problem of airport location.
Conclusions: Based on the overview of literature of the subject, the authors point to three types of approach to the issue of airport location which could enable further development of currently applied methods.
http://www.logforum.net/vol12/issue3/no8/12_3_8_16.pdf
airport location
optimization
ranking variations
eng
Poznan School of Logistics
Logforum
1734459X
2016-09-30
12
3
article
Assessing transport susceptibility of rapeseed meal fractionation products
Milena Bojanowska
1
Maritime University of Szczecin,, Szczecin, Poland
Background: Having considered increasing production of liquid and solid biofuels from rapeseed and bearing in mind its stable and unquestionable position in the food and animal feed industries, a rational approach towards technologically and logistically efficient utilization of by-products from rapeseed processing is required. The aim of the research presented in the article is to assess the transport susceptibility of rapeseed meal fractions, varying according to particle size and chemical composition.
Methods: Resistance to changes stimulating self-heating has been assumed as the main criterion of transport susceptibility. The following diagnostic variables have been experimentally determined: total protein, crude fat and crude fiber content, porosity, and water activity in the fraction of examined meal. In order to organize a set of particles and to indicate their optimal applications according to criteria chosen with regard to both utilization and transportation, two aggregate indicators have been calculated.
Results: It has been proved that medium-sized particle fractions (0.075-0.4 mm) exhibit the lowest transport susceptibility, whereas the those with the largest granulations (>3 mm) -have the highest. One significant relationship is the decline of feeding value and concurrent increase in the transport susceptibility of meal fractions, which in practice means that those fractions least-favoured by the animal feed industry can be least cumbersome to transport.
Conclusions: It has been suggested that there should be a division of rapeseed meal into two products with different applications and different transport susceptibility. The fractioning of meal can bring numerous, measurable benefits for the meal industry and logistics processes for solid biofuels, where storage and transport properties have considerable importance, alongside commodity price and transport costs.
http://www.logforum.net/vol12/issue3/no9/12_3_9_16.pdf
self-heating
transport of biomass
sustainable energy logistics
solid biofuels
utilization of rapeseed
eng
Poznan School of Logistics
Logforum
1734459X
2016-09-30
12
3
article
The use of instruments of logistics and marketing in transport enterprises in lubuskie voivodeship
Agnieszka Perzyńska
1
Krzysztof Witkowski
1
University of Zielona Gora, Zielona Góra, Poland
Background: The aim of the article is to verify the logistics and marketing instruments used in transport enterprises in Lubuskie voivodeship. The article presents the results of surveys of transport companies. Based on these studies in transport enterprises in Lubuskie, the current level of the use of logistics and marketing instruments was determined. Logistics and marketing instruments were separated to study the needs of transport companies in Lubuskie voivodeship. The choice of these instruments gave rise to a study f the possibility of using them in the implementation of business operations. From the findings it can be inferred that they are useful for the voivodeship, and that such a system can be implemented in the whole country.
Methods: The study was conducted in the second half of 2014 and 140 transport enterprises in Lubuskie. Based on the research results, classifications of instruments were developed using logistics and marketing division at their levels.
Results: On the basis of these findings and observations, the authors have analysed the levels of identification instruments, logistics and marketing. On this basis, it was possible to identify the instruments used by logistics and marketing in these companies.
Conclusions: Based on the study of transport companies in Lubuskie voivodeship, a selection of logistics and marketing instruments were identified, along with a classification of the logistics and marketing instruments used. With the implementation of the above steps to classify the usage level of logistics and marketing instruments, the ability to match these levels to data transport companies was established.
http://www.logforum.net/vol12/issue3/no10/12_3_10_16.pdf
transport companies
instruments
logistics
marketing tools
transport