I Table of contents
I Table of contents II
III List of symbols IV
IV List of figures V
1 Introduction 1
2. Reverse logistics and ELV collection network 2
3. Mathematical model formulation 4
3.1 The model based on UFLP 4
3.2 The model based on the MCLP 6
4. Numerical example for ELV collection network design 9
5. Conclusion 13
Bibliography 14
II List of abreviations
ELV End-of-life vehicles
FCFLP Fixed Charge Facility Location Problem
MCLP Maximal Covering Location Problem
UFLP Uncapacitated Facility Location Problem
III List of symbols
I the set of demand nodes indexed by i
J the set of candidate facility locations indexed by j
d_ij distance between demand node i and candidate site j
f_j fixed cost of locating facility at candidate site j
h_i demand at node i
α cost per unit demand per unit distance
the facility is opened if it is equal to 1 and 0 if not
y_ij fraction of demand at node i that is served by facility at node j
p predefined number of facilities to locate
D maximal coverage distance
the set of all candidate locations that can cover demand point i
y_ij fraction of demand at node i that is served by facility at node j
p predefined number of facilities to locate
D maximal coverage distance
the set of all candidate locations that can cover demand point i
demand node I is fully covered when equal to 1 and 0 if not
IV List of figures
Figure 1: A generic supply chain network 3
Figure 2: Sensitivity analysis based on results from adapted UFLP model…………….9
Figure 3: Sensitivity analysis based on results from adapted MCLP model for 85 and 95 percents of demand coverage…………………………………………………………..11
Figure 4: Three-dimensional relation between distan...
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Gulfstream Aerospace is one of leading corporate jet manufacturers in the world. They have been building jets since the late 50’s and continue to create top of the line aircraft which have become the status symbol of success. With their success comes an extensive company infrastructure and supply chain. First, we will discuss how Gulfstream uses the location to maximize the effectiveness of its supply chain. Then we will look at the business case for Gulfstream’s approach to its supply chain, and in particular, does it make sense to have a car follow supplies while it is on the rail system. Finally, we will look at Gulfstream’s to the “just in time” manufacturing and its strategic approach to choosing locations.
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. Matthew D. Cox, “Virtual Library Logistics: Logistics Quotations,” “Logistics World,” September 4, 1999. Accessed February 21, 2014), http://www.logisticsworld.com/logistics/ quotations.htm.
The remaining context of this article will be centered on manufacturing operations. The manufacturing operations are operated in two equal size facilities of approximately 80,000 square feet a...
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Reverse logistics has become an increasing concern for many companies over the last decade. It is the process of the movement of goods, moving in the opposite direction, such as from the customer to the business. Some important processes involved are the physical movement of goods, customer support, warehousing and repair. Reverse logistics handles the issue of handling resources effectively. Rogers and Tibben-Lembke (1999) defines reverse logistics as the ‘process of planning, implementing, and controlling the efficient, cost effective flow of raw materials, in-process inventory, finished goods and related information from the point of consumption to the point of origin for the purpose of recapturing value or proper disposal’. This definition is seen to...
A detailed analysis should be made on performance of 13 distribution centers – capacity, inventory turnover, costs etc. It appears most of the centers should be closed as they serve as excessive link in the supply chain, accumulating high inventory levels.
The term logistics is originally from the military, which consist by the supply of necessary items for national defence. Till 1960s this term was started to be used in the business and management area, it mainly was used to describe the physical distribution. During the development of the management science and technology, during 1970s to 1980s, logistics had more functions, includes the inbound and outbound logistic which separately support manufacturing, with materials management and marketing with physical distribution (Coyle, Langley, Novack). In the 1990s, logistics had been defined as a process which includes the controlling of goods, and information from start point to end customer requirement. It also includes inbound, outbound, internal
‘ICAO | Office of the Secretary General (OSG)’, 2011, ICAO [Online] Available , Accessed 15 June 2011.
Aramex has over 40 leading express logistics providers around the world, each has its own sector in the region together covering the world a...
Zanjirani F., Rezapour, S. & Kardar, L. (2011) Logistics operations and management concepts and models, 1st ed. London ; Elsevier.
They store inventory between the supply chain stages such as distribution centres, retailers and warehouses. Another function of Facilities is to transform raw materials into finished goods at actual physical locations. Barilla may design their facilities to be flexible so that it can respond quickly to market demands as compared to a dedicated facility. If Barilla’s facilities are located close to the market, responsiveness can be increased at the cost of decreased economies of scale that might be achieved with a centralised location. On the other hand, Barilla has to assure that the company’s facilities is not under capacity as this will cause the company to be less responsive compared to having facilities that are appropriately sized or has excess capacity. Increasing the number of facilities will increase Barilla’s facility and inventory costs but it decreases the transportation costs and reduces response time. However, increasing the flexibility or capacity of their facilities will increase the facility cost but decrease the inventory costs and response time. By setting up their facilities in both centralised and decentralised locations and also considering the proximity to customers, Barilla can improve the efficiency and responsiveness of their supply chain. Barilla can also use different approaches to manufacturing for the plants located
Logistics is the designing and managing of a system in order to control the flow of material throughout a corporation. This is a very important part of an international company because of geographical barriers. Logistics of an international company includes movement of raw materials, coordinating flows into and out of different countries, choices of transportation, cost of the transportation, packaging the product for shipment, storing the product, and managing the entire process. The concept of logistics is fairly new in the business world. The theoretical development was not used until 1966. Since then, many business practices have evolved and logistics currently costs between 10 and 25 percent of the total cost of an international purchase.
As an outcome of the thesis, my professional interest on the issue associated with the development of logistics sector has been enhanced. Furthermore, I am planning to keep an eye on the sector to enhance my knowledge which will benefit me and the organization I work for.