1,720,960 research outputs found
Supply chain network design for the diffusion of a new product
Full text linkSupply Chain Network Design (SCND) deals with the determination of the physical configuration and infrastructures of the supply chain. Specifically, facility location is one of the most critical decisions: transportation, inventory and information sharing decisions can be readily re-optimized in response to changes in the context, while facility location is often fixed and
difficult to change even in the medium term. On top of this, when designing a supply network to support a new product diffusion (NPD), the problem becomes both dynamic and stochastic. While literature concentrated on approaching SCND for NPD separately coping with dynamic and stochastic issues, we propose an integrated optimisation model, which allows warehouse positioning decisions in concert with the demand dynamics during the diffusion stage of an innovative product/service. A
stochastic dynamic model, which integrates a Stochastic Bass Model (SBM) in order to better describe and capture demand dynamics, is presented. A myopic policy is elaborated in order to solve and validate on the data of a real case of SCND with 1,400 potential market points and 28 alternatives for logistics platforms
A stochastic dynamic programming approach for integrating supply chain network design and new product diffusion
Full text linkWe focus on the problem of designing a supply chain for a new product. We propose a stochastic dynamic program based on a Stochastic Bass Model of the product demand dynamics. We heuristically solve our model using Monte Carlo simulation and math programming techniques. We apply our approach to the case of a new distribution service for Made-in-Italy wine and food products, benchmarking the performance of our heuristic policy against the performance of an easier to compute heuristic policy and a lower bound
A Strategy Oriented Framework for Food and Beverage E-Supply Chain Management
Full text linkSeveral authors have emphasized the importance of analysing the impact of e-business, e-commerce and online-shopping on supply chain and operations management; however, it seems that to date no one has suggested a comprehensive framework that could help identify and support supply chain design decisions for companies about to enter the online-business in the consumer goods retail trade, encompassing the business drivers at a strategic level. This paper aims to bridge the gap between theoretical taxonomies or abstract models and the concrete supply chain design problems encountered by logistics managers who need to take their Food & Beverage retail company into the internet business while also preserving a consistent alignment with their current company strategy. Some insights on this area are presented along with a field study approach and a proposal of a 6-phase framework to jointly manage all the relevant strategic and functional aspects of supply networks
A business process modeling approach to support production systems analysis and simulation
No full textIn this paper we propose a reference model conceived to simplify the development of production simulation paradigms as well as to support software houses in formalizing the main functions and properties of manufacturing systems simulation software. The proposed model results from a research project aiming to the design of a new manufacturing systems simulation tool, embedding the main production and logistics processes archetypes. Indeed, the designed tool natively entrenches several well-known production and inventory control policies on top of the greatest part of the typical processes and work methods in a manufacturing plant; the model is formally represented in Business Process Modelling Notation, which increase its clearness and the related benefits for industrial users.
The proposed reference model architecture and working logic has been validated on a manufacturing company case study
Issues in integrating MRP in production systems simulation tools
Full text linkLiterature review suggests concentrating on the development of new reference model for manufacturing system simulation, which may implement an operation logic much closer to real industrial contexts. A production system modelling tool should be designed with the aim of standardizing and simplifying the simulation of manufacturing processes and to widespread this approach in {SMEs.} Pursuing this aim, the authors got committed in designing a reference model for providing a structural framework to support shop-floor simulation and optimization. This paper presents the basic framework logic and structure of the simulation tool, showing how it is possible to represent it in Business Process Modelling Notation {(BPMN).} The efforts of implementing an {MRP} module on top of a simulation tool, which was originally conceived to embed look-back material handling policies, are described together with the operative solutions chosen to reach the integration
Manufacturing Systems Modelling and Simulation Software Design: a Reference Model
Full text linkNowadays production environments request standard efficient frameworks in order to map and simulate manufacturing processes which literature or market can barely provide. A generalized reference model is necessary to highlight the differences and affinities among manufacturing systems resources, so as to examine the possibilities of modelling of such concepts and their respective roles. {OPUS} project formalizes a new modelling and simulation language for productive manufacturing systems through the support of an optimization tool development. On a practical level a {BPMN} approach has been useful to conceive a model strictly related to business processes, in addition to the simplification of the implementation/coding of the simulation tool
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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