1,720,964 research outputs found
Metrics For Global Logistics And Transportation Facility Information Assurance, Security, And Overall Protection
No full textThe paper proposes the start-up phase of a research project aiming to develop and to diffuse innovative metrics for measuring the impact of security solution on transportation facilities and global logistics After an analysis of the problems concerning the development methodologies and a focus on the task of modeling and simulation within this context, it is proposed a simple application example, regarding the security of a container terminal
Inventory management costs analysis under different control policies
No full textThe objective of the paper is to use a simulator, implemented in AnylogicTM by XJ Technologies, for testing the effect of demand variability, demand intensity and lead time on the inventory management costs within a warehouse
Industrial workstations design: A real case study
No full textThe research work advances the effective design of the most critical workstations belonging to a real industrial plant; to this end, the authors propose an approach based on the integration of Modeling & Simulation tools, several ergonomic standards and the most known work measurement tools. The Modeling and simulation tools allow to implement a three-dimensional environment capable of recreating, with satisfactory accuracy, the evolution over the time of the real workstations. The ergonomic standards consent to evaluate the ergonomic risks level within the system being considered. The work measurement tools permit to calculate the time required for performing all the workstations operations. The effective design of the workstations is achieved by using the simulation model for comparing workstations' alternative configurations. The comparison is based on ergonomic and time indexes related to the ergonomic standards and the work measurement tools. Such comparison allows to choose the workstations final configurations
Shop orders scheduling: Dispatching rules and genetic algorithms based approaches
No full textIn the wide context of production planning a critical role is played by the operative programming, or short period production planning, whose results affect considerably the production system performances. The research work presented in this paper is focused on the Shop Orders scheduling problem into a real manufacturing system using dispatching rules and genetic algorithms based approaches supported by Modelling & Simulation. The objective is to verify the behaviour of different dispatching rules as well as to test the potentialities of production planning guidelines obtained by using genetic algorithms
Airport terminals' performance analysis: A case study
No full textThe paper presents a simulation model of an Italian airport terminal, the International Airport of Lamezia Terme in Calabria (Italy). The software tool adopted for the simulation model implementation is AnylogicTM by XJ Technologies. After the modeling phase, the simulation model has been validated comparing simulation results with real system results. The performance measure chosen for testing system behavior under different operative scenarios is a mean utilization index of the terminal. The output data of the simulation model are then analyzed by means of ANOVA in order to understand how some critical input parameters (number of security check lines, of passport controls and check-ins) affect system performance
"Warehouse Management: Inventory Control Policies Comparison"
No full textThis paper aims at investigating the effect of some parameters (i.e. the demand intensity, the demand variability and the lead time) on three different inventory control policies. To this end a parametric simulator is implemented in order to perform what-if analyses and scenarios investigation. The performance parameter chosen for the inventory management policies comparison is the unit inventory management cost. Finally, the analytical relationship between the unit inventory management cost and the input parameters is determined
Most and MTM for work methods optimization: A real case study based on modeling & simulation
No full textThe starting point of the research work is the actual configuration of a workstation (Pressure test workstation) belonging to a manufacturing system operating in the field of idraulic hoses production. The objective of the paper is twofold. From one side it aims at comparing four different work methods for optimizing the workstation productivity. Note that the comparison is accomplished according to the work methods process time. From the other side the authors aim at comparing two different work measurement methods trying to establish the more efficient one. Note that the work measurement methods are used for calculating the work methods process time. Moreover, the authors adopt a Modeling & Simulation (M&S) based approach for implementing a three dimensional environnment capable of recreating the Pressure test workstation with satisfactory accuracy. It allows the researchers to conduct the simulation study without disturbing the real system. Copyright © (2008) by CAL-TEK S.r.l
Workstation productivity enhacement within hydraulic hoses manufacturing process
No full textThe paper proposes the effective redesign of a workstation belonging to a manufacturing process devoted to produce high pressure hydraulic hoses. The objective of the study is to increase the workstation productivity in terms of number of Shop Orders being completed on monthly basis. To this end, the authors adopt an approach based on Modelling & Simulation as support tool for implementing a three dimensional environment capable of recreating, with satisfactory accuracy, the real workstation. A final configuration of the workstation is presented and higher productivity levels are achieved
Warehouse inventory management based on fill rate analysis
No full textThe focus of this paper is the warehouse inventory management considering three inventory control policies under the effect of different demand patterns and lead times. The behavior of the inventory control policies in terms of fill rate is tested and the relationship between the policies and the demand patterns and lead time is evaluated
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