1,721,095 research outputs found
World class manufacturing: origine sviluppo e strument
No full textQuando si parla di eccellenza, si pensa subito a un livello di qualità molto elevato. Potrebbe definirsi “l’asintoto cui tende la qualità aziendale”.
Un’azienda eccellente, però, oggi è molto di più. Un’azienda si definisce eccellente quando è fortemente orientata al cliente, riduce i costi della non qualità, aumenta la propria redditività ed efficienza, valorizza e motiva i propri dipendenti, è flessibile rispetto alle richieste del mercato, e opera in una logica di miglioramento continuo. Più sinteticamente, oggi si potrebbe dire che lavora in World Class Manufacturing (WCM).
Il testo analizza, attraverso un linguaggio discorsivo ma rigoroso, la storia e l’evoluzione dei sistemi produttivi, dalla Produzione artigianale ai processi di tipo World Class Manufacturing, esaminando nel dettaglio il modello World Class Manufaturing e gli strumenti per il miglioramento di un processo di tipo lean.
L’approccio proposto, non è semplicemente una “tecnica”, ma un metodo generale per affrontare problemi di gestione nell'organizzazione del lavoro e della produzione industriale. A conclusione del testo, vengono presentati diversi case study relativi ad esperienze maturate in alcune realtà produttrici Italiane.
Il testo è il primo lavoro in lingua italiana corredato dall’introduzione del Dott. Richard J. Schonberger, ideatore dell’approccio metodologico del WCM.
Il volume è, inoltre, arricchito da tabelle, figure e grafici, fondamentali per poter correttamente interpretare le tematiche, talvolta complesse, proprie di questa disciplina
A proposal of a new methodology for the optimization of the WEEE management process in a company producing Cathode Ray Tubes
No full textIn this paper, through suitable energetic balances, we have quantified the energy saving obtainable by reducing the quantity of raw materials (glass) feeding the process, through the closed-loop recycling, of the cathode ray tube glass that reached the end of its life cycle. For this purpose we adopted a methodology called the FIAI Method. Such a method consists of the introduction of two parameters aiming at controlling both the practicability of the investment concerning the environmental improvement (FI) and the advantage that such intervention causes as regards environmental impact and general energy saving (AI). © 2005 WIT Press
Lay-out optimisation through an integrated approach based on material flow and operations mapping using a commercial software
No full textThe overall performance of an industrial firm is significantly affected by the design of its manufacturing facility. Factory design and plant optimisation are increasingly complex and capital-intensive. That is why factory design projects require a great deal of modelling, analysis, and program management to ensure acceptable system performance after implementation. From this point of view the material handling plays a crucial role in flexible manufacturing systems. Given the complexity of material handling system, the aim of this paper is to investigate the challenges of the development and deployment of a multi objective approach in order to provide the company with a layout that is able to optimise the available space, speed up the transfer of material between the various units of the plant and ensure a continuous flow and the closeness between units where there is an important relationship. The final goal of the optimisation is to find a production schedule that satisfies different, contradictory production and business constraints. Definitively, the main objective of the paper is to apply multi-disciplinary approach, tools and techniques to propose an innovative theoretical methodological approach. To illustrate the efficiency and applicability of the proposed method, it is also applied into a real case in a parts manufacturing company in Italy
Maintenance strategy design in a sintering plant based on a multicriteria approach
No full textMaintenance strategy design greatly contributes to ensure the of
pre-established production capacity of an industrial system and to reduce
organisation cost, without compromising customer satisfaction resulting in loss
of market share. The focus of the present research is a new model for
maintenance policy developed and implemented in a case study. The new
approach is focused on the adequate distribution of maintenance budget to
system units according to the main factors determining availability and
maintenance of equipment. These factors are summarised through appropriate
indices, adjusted through a multicriteria method, the analytic hierarchy process
(AHP), depending on the importance level of each considered factor and unit of
the system. The results can be used as a support for allocation of budgets to
maintenance activities, identifying machines or units that are strategic to ensure
production. The model has been applied on a real industrial plant
A Multi –objective methodological approach for mapping material flows and optimizing layout
No full textThe aim of the proposed study is to present an original decision support methodology (DSM) for mapping materials flows and optimizing lay-out in order to design, management, and control the whole systems. Specifically, the proposed DSM implements a top-down methodology that considers both the mapping of materials flows and the optimization of lay-out, through the integration of different operative techniques and commercial software. In particular, the aim of this paper is to investigate the challenges of the development and deployment of a multi objective approach in order to provide the company with a layout that is able to optimize the available space, speed up the transfer of material between the various units of the plant and ensure a continuous flow and the closeness between units where there is an important relationship. The final goal of the optimization is to find a production schedule that satisfies different, contradictory production and business constraints
Modeling and simulation of an assembly line: A new approach for assignment and optimization of activities of operators
No full textIn the paper we will suggest an approach based on modeling and simulation for the assignment of activities to the operators of a flexible assembly line. Thanks to the above approach, it will be possible to optimize the workload of each operator, in particular to reduce nonvalue and increase saturation. Through the adoption of a specific modeling logic, we can simulate lines with high flexibility of manufacturing and assembly, in various industrial sectors. Starting from the analysis of a real case and following an incremental approach, a simulation model has been realized, verified and validated, which allows to obtain useful information about: production mix; percentages of saturation; lead time and optimization of the assembly line. Copyright © (2011) by CAL-TEK S.r.l
A weighing algorithm for checking missing components in a pharmaceutical line
Full text linkTo meet the requirements and specifications coming from the surrounding society, the socio-economic progress involves the development of new products, new technologies, new organizational forms etc. Companies are constantly looking for methods or procedures to improve production and income; but, the enterprise growth is strictly linked to the reliability of its internal processes. Internal failures can often cause loss of image. The goal of the present work is the development of an algorithm able to optimize the production line of a pharmaceutical firm. In particular, the proposed weighing procedure allows both checking missing components in packaging and minimizing false rejects of packages by dynamic scales. The main problem is the presence at the same time, in the same package, of different components with different variable weights. The consequence is uncertainty in recognizing the absence of one or more components
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
Maintenance critical analysis and priority index: A new model for maintenance policy
No full textIndustrial processes are realized according to production levels established in the design phase. Proper maintenance of machines involved in the process guarantees the compliance of these levels over time, ensuring adequate availability standards of plant and machinery. Conversely, inadequate maintenance can affect a decrease of production levels. In this case, the company may not respect the demands of customers, resulting in economic losses, which may affect its survival. In this paper, a new procedure is proposed, in order to develop a useful tool to support the design of maintenance. The proposed procedure is based on the identification of the main factors influencing availability and maintenance of industrial plants, then summarized through appropriate indices. Indices analysis allows the identification of the guidelines, to optimize the maintenance of the units. This tool allows an appropriate allocation of budgets to maintenance activities, right for machines or units that are strategic to ensure production
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