eng
Poznan School of Logistics
Logforum
1734459X
2017-09-30
13
3
article
GLN standard as a facilitator of physical location identification within process of distribution
Davor Dujak
1
Martyna Zdziarska
2
Adam Koliński
3
Josip Juraj Strossmayer University in Osijek, Osijek, Croatia
Institute of Logistics and Warehousing, Poznan, Poland
Poznan School of Logistics, Poznan, Poland
Background: Distribution, from the business point of view, is a set of decisions and actions that will provide the right products at the right time and place, in line with customer expectations. It is a process that generates significant cost, but also effectively implemented, significantly affects the positive perception of the company. Institute of Logistics and Warehousing (IliM), based on the research results related to the optimization of the distribution network and consulting projects for companies, indicates the high importance of the correct description of the physical location within the supply chains in order to make transport processes more effective. Individual companies work on their own geocoding of warehouse locations and location of their business partners (suppliers, customers), but the lack of standardization in this area causes delays related to delivery problems with reaching the right destination. Furthermore, the cooperating companies do not have a precise indication of the operating conditions of each location, e.g. Time windows of the plant, logistic units accepted at parties, supported transport etc. Lack of this information generates additional costs associated with re-operation and the costs of lost benefits for the lack of goods on time. The solution to this problem seems to be a wide-scale implementation of GS1 standard which is the Global Location Number (GLN), that, thanks to a broad base of information will assist the distribution processes.
Material and methods: The results of survey conducted among Polish companies in the second half of 2016 indicate an unsatisfactory degree of implementation of the transport processes, resulting from incorrect or inaccurate description of the location, and thus, a significant number of errors in deliveries. Accordingly, authors studied literature and examined case studies indicating the possibility of using GLN standard to identify the physical location and to show the perspective of its implementation in the TSL industry.
Results: Result of the work is an analysis of the current situation and problems associated with an identification of physical locations in the distribution process and the description of the information needs of the TSL industry. Shows strengths and weaknesses of the GLN standard and opportunities and threats arising from its implementation in logistics. In addition, authors developed a business model that main aspect is the value proposition and benefits for stakeholders in the processes of distribution.
Conclusions: The ability to implement GS1 standards in logistics, despite numerous references to literature and the real needs of business, it is still ambiguously defined. Therefore, in this article authors focus on the concept of using GLN standard to improv
http://www.logforum.net/vol13/issue3/no1/13_3_1_17.pdf
GS1 standards
GLN
distribution process
identification of the physical location
eng
Poznan School of Logistics
Logforum
1734459X
2017-09-30
13
3
article
A random search algorithm for cyclic delivery synchronization problem
Katarzyna Gdowska
1
Roger Książek
1
AGH University of Science and Technology, Krakow, Poland
Background: The paper is devoted to the cyclic delivery synchronization problem with vehicles serving fixed routes. Each vehicle is assigned to a fixed route: the series of supplier’s and logistic centers to be visited one after another. For each route the service frequency is fixed and known in advance. A vehicle loads at a supplier’s, then it delivers goods to a logistic center and either loads other goods there and delivers them to the next logistic center along the route or goes to another logistic center. Each logistic center can belong to several routes, so goods are delivered there with one vehicle and then they departure for the further journey with another truck. The objective of this cyclic delivery synchronization problem is to maximize the total number of synchronizations of vehicles arrivals in logistic centers and their load times, so that it is possible to organize their arrivals in repeatable blocks.
Methods: Basing on the previously developed mathematical model for the cyclic delivery synchronization problem we built a random search algorithm for cyclic delivery synchronization problem. The random heuristic search utilizes objective-oriented randomizing. In the paper the newly-developed random search algorithm for cyclic delivery synchronization problem is presented.
Results: A computational experiment consisted of employing the newly-developed random search algorithm for solving a series of cyclic delivery synchronization problems. Results obtained with the algorithm were compared with solutions computed with the exact method.
Conclusions: The newly-developed random search algorithm for cyclic delivery synchronization problem gives results which are considerably close to the ones obtained with mixed-integer programming. The main advantage of the algorithm is reduction of computing time; it is relevant for utilization of this method in practice, especially for large-sized problems.
http://www.logforum.net/vol13/issue3/no2/13_3_2_17.pdf
cyclic delivery synchronization n problem
mixed-integer programming
optimization
heuristic algorithms
random search
eng
Poznan School of Logistics
Logforum
1734459X
2017-09-30
13
3
article
Intermodal Logistics Centres and Freight Corridors – Concepts and Trends
Norbert Wagener
1
Wagener&Herbst Management Consultants GmbH, Potsdam, Germany
. Background: The development of international freight corridors, as the Trans European Network and new rail and inland shipping corridors in Asia and Africa, require efficient logistics centres along these corridors which serve as intermodal interfaces and provide a variety of different logistics service functions. The definition of the term logistics centre differs between countries and implies different functionalities. Locations are often selected randomly and business models are opportunity driven, especially in highly dynamic and less regulated new emerging economies. In particular Freight Villages as a special form of logistics centres have a high impact on regional development and serve as cargo generator for freight corridors. Consideration of general principles how to establish Freight Villages could improve the effectiveness of these logistics centres along freight corridors.
Methods: Based on a literature review a comprehensive and hierarchical definition of logistics centres will be discussed and applied. From experiences in the development of logistics centres in several countries, especially in Germany and Lithuania, challenges and concepts concerning regulatory framework, determination of location and business and financing models are discussed.
Results: Concerning the definition of logistics centres a hierarchical definition is applied which comprises different levels of logistics centres depending on the scope of the value adding and the functionality. As general principles for the development of Freight Villages the active role of the state, master planning, objective location finding, participation and co-operation of different stakeholders in the business model and a stepwise scheme for financing are introduced. Major trends for the future development of Freight Villages are the digitalization of supply chains, the application of new intermodal technologies and of innovative telematics systems, solutions for low emission and electro mobility, especially in connection with city logistics, and the collaboration of Freight Villages.
http://www.logforum.net/vol13/issue3/no3/13_3_3_17.pdf
Logistics Centres
Freight Villages
Freight Corridors
Intermodal Transport
Multimodal Transport
Güterverkehrszentrum
eng
Poznan School of Logistics
Logforum
1734459X
2017-09-30
13
3
article
Determinant factors of industrial purchasing personnel’s adoption of internet for business purchasing related activities
Shook Mei Chan
1
Siohong Tih
1
University Kebangsaan Malaysia, Bangi, Malaysia
Background: The purpose of this research is to examine a path model and the mediating effect of perceived communication convenience towards explaining industrial purchasing personnel’s Internet adoption for business purchasing related activities. It involves sequencing paths examinin
http://www.logforum.net/vol13/issue3/no4/13_3_4_17.pdf
Internet adoption
perceived communication convenience
perceived Internet skills
supplier support
eng
Poznan School of Logistics
Logforum
1734459X
2017-09-30
13
3
article
Forming of the dynamics of the changes in convergent production system depending on size of production party
Bożena Zwolińska
1
Łukasz Kubica
2
AGH University of Science and Technology, Kraków, Poland
Jagiellonian University in Kraków, Kraków, Poland
Background: In terms of Lean Six Sigma, the whole process focuses on clients and their needs. Existence of a client generates the supply of companies. Extended customization has a negative impact for a structure of the production system. Dynamics of changes and no predictability of system’s state in time t+1 lead to increase of the operational costs. It particularly affects those companies which are producing goods using MTO (make – to – order) method in short series. The goal of this article is to establish a mathematical model defining how the structure of a production system is subject to change depending on the volume of the production batch for a production system in accordance with MTO. Furthermore pilot calculations have been presented which determine the probability value, how subsequent random variables are contained within three standard deviations (±3δ) from the determined expected value (ET) for the entire production structure. Months of analysis and research on introducing selected lean toolbox components to a polish company from the small and medium enterprises sector resulted in the models presented in the article. The production structure of the discussed actual facility is complex and is of converged nature in accordance with MTO, while the final products are manufactured in short production series with a relatively wide customization options.
Materials and results: Wrought models consider theories of Klir and Maserovicz [Mesarovic 1964] and also theory of mass operation (one of the probability areas). In the article there are results from two models which are fundamental in defining problems in logistics engineering and production in scientific research. Important attribute of presented models is a fact that they consider relations between variables in a structure of consecutive processes and also consider relations between a size of production party and a real object.
Presented models are not only theoretical coverage but also consider real relations between objects. Real productive object specialized in producing cooling devices destined to store hematogenous objects, plasma and cryoprecipitate has been analyzed. Those devices have very strict quality requirements (consistent with ISO 13485 and CE0434 in accordance with Directive 93/42/EEC).
In the article there is a presentation of three models which indicates two different functions of production time for production party of 2 ≤ k ≤ 30 and k > 30 items. In the following model there are a few different parameters of the production system: variab
http://www.logforum.net/vol13/issue3/no5/13_3_5_17.pdf
Convergent production system
model of the changes’ dynamics
eng
Poznan School of Logistics
Logforum
1734459X
2017-09-30
13
3
article
The impact of COI-based storage on order-picking times
Grzegorz Tarczyński
1
Wrocław University of Economics, Wrocław, Poland
Background: The increasing competitiveness on the global markets enforces the need for a fast and reliable delivery. This task is possible to perform by improving the order-picking systems. The implementation of automated storage and retrieval systems (AS/RS) is not always profitable. In the warehouses where the order-picking is performed in accordance with the principle of picker-to-part rule, the picking efficiency optimization includes among others: the warehouse layout, the storage policy, the routing heuristic, the way of zoning, the order-batching method, and the sequencing of pick-lists. In the paper the impact of the storage policy on the order-picking times is checked.
Methods: The influence of storage based on Heskett’s cube-per-order index (COI) on the average order-picking times is analyzed. The items based on increasing values of COI index are divided on classes. To determine the demand for items the analytical function proposed by Caron is used.
Results: In the paper the benefits of storage based on COI index are compared with random storage and storage based only on picking frequency. It is assumed that the bin, to which the picker collects items has limited capacity – some orders has to be divided on smaller pick-lists. The analysis was performed using simulation tools. Additionally, the algorithm (taking into account different sizes of picker’s bin) for order-batching is presented.
Conclusions: The analysis shows that the COI-based storage is particularly effective when the size of items increases. The COI-based curve is less skewed than the curve based only on picking frequency. The choice of storage policy should be carried out together with routing heuristic. The use of batching algorithm significantly increases the effectiveness of the order-picking process, but the optimal size of picker’s bin (and batch) should be optimized with consideration the sorting process.
http://www.logforum.net/vol13/issue3/no6/13_3_6_17.pdf
order-picking
COI index
simulations
eng
Poznan School of Logistics
Logforum
1734459X
2017-09-30
13
3
article
Alignment of global supply networks based on strategic groups of supply chains
Nikos G. Moraitakis
1
Jiazhen Huo
1
Hans-Christian Pfohl
2
Tongji University, Shanghai, China
Technische Universität Darmstadt, Darmstadt, Germany
Background: From a supply chain perspective, often big differences exist between global raw material suppliers’ approaches to supply their respective local markets. The progressing complexity of large centrally managed global supply networks and their often-unknown upstream ramifications increase the likelihood of undetected bottlenecks and inefficiencies. It is therefore necessary to develop an approach to strategically master the upstream complexity of such networks from a holistic supply chain perspective in order to align regional competitive priorities and supply chain structures. The objective of this research is hence to develop an approach for the supply-chain-based alignment of complex global supply networks.
Method: We review existing literature from the fields of supply chain and network management, strategic sourcing, and strategic management. Based on the literature review and theoretical and practical considerations we deduce a conceptual approach to consider upstream supply chain structures in supply network alignment initiatives.
Results: On the basis of these considerations and current empirical literature we transfer strategic group theory to the supply network management context. The proposed approach introduces strategic groups of supply chains as a segmentation criterion for complex global supply networks which enables the network-wide alignment of competitive priorities.
Conclusion: Supply-chain-based segmentation of global supply network structures can effectively reduce the complexity, firms face when aiming to strategically align their supply chains on a holistic level. The results of this research are applicable for certain types of global supply networks and can be used for network alignment and strategy development. The approach can furthermore generate insights useable for negotiation support with suppliers.
http://www.logforum.net/vol13/issue3/no7/13_3_7_17.pdf
supply chain management
global supply networks
supply network segmentation
supply network alignment
strategic groups
strategic sourcing
eng
Poznan School of Logistics
Logforum
1734459X
2017-09-30
13
3
article
Analysis of the influence of the lot sizing on the efficiency of material flow in the supply chain
Roman Domański
1
Michał Adamczak
1
Poznan School of Logistics, Poznań, Poland
Background: Due to the rapidly changing needs of suppliers and customers classic methods of lot sizing do not work. Meanwhile, the target for logistics remains all the time the same: to realize the flow of materials in the supply chain as efficiently as possible. Today, efficiency is understood as the sum of two components: the effectiveness - understood as the degree of achieving the objective (i.e. customer service level indicator) and efficiency - understood as a way to ach
http://www.logforum.net/vol13/issue3/no8/13_3_8_17.pdf
supply chain
efficiency of material flow
lot sizing
distribution of demand
eng
Poznan School of Logistics
Logforum
1734459X
2017-09-30
13
3
article
Replenishment policy for Entropic Order Quantity (EnOQ) model with two component demand and partial back-logging under inflation
Bhanupriya Dash
1
Monalisha Pattnaik
1
Hadibandhu Pattnaik
1
Sambalpur University, Burla, India
Background: Replenishment policy for entropic order quantity model with two component demand and partial backlogging under inflation is an important subject in the stock management.
Methods: In this paper an inventory model for non-instantaneous deteriorating items with stock dependant consumption rate and partial back logged in addition the effect of inflection and time value of money on replacement policy with zero lead time consider was developed. Profit maximization model is formulated by considering the effects of partial backlogging under inflation with cash discounts. Further numerical example presented to evaluate the relative performance between the entropic order quantity and EOQ models separately. Numerical example is present to demonstrate the developed model and to illustrate the procedure. Lingo 13.0 version software used to derive optimal order quantity and total cost of inventory. Finally sensitivity analysis of the optimal solution with respect to different parameters of the system carried out.
Results and conclusions: The obtained inventory model is very useful in retail business. This model can extend to total backorder.
http://www.logforum.net/vol13/issue3/no9/13_3_9_17.pdf
Entropic Order Quantity (EnOQ)
two component demand
partial back-logging
inflation.