5 research outputs found

    Comparing the performances of two techniques for the optimization under parametric uncertainty of the simultaneous design and planning of a multiproduct batch plant

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    This paper addresses the comparison between two techniques for the optimization under parametric uncertainty of multiproduct batch plants integrating design and production planning decisions. This problem has been conceived as a two-stage stochastic mixed integer linear programming (MILP) in which the first-stage decisions consist of design variables that allow determining the batch plant structure, and the second-stage decisions consist of production planning continuous variables in a multiperiod context. The objective function maximizes the expected net present value. In the first solving approach, the problem has been tackled through mathematical programming considering a discrete set of scenarios. In the second solving approach, the multi-scenario MILP problem has been reformulated by adopting a simulation-based optimization scheme to accommodate the variables belonging to different management levels. Advantages and disadvantages of both approaches are demonstrated through a case study. Results allow concluding that a simulation-based optimization strategy may be a suitable technique to afford two-stage stochastic programming problems.Sociedad Argentina de Inform谩tica e Investigaci贸n Operativ

    Impacto de nociones de disponibilidad en la evaluaci贸n econ贸mica de proyectos de generaci贸n 贸ptimos

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    El presente trabajo tiene por objetivo estudiar el impacto de considerar distintas nociones de disponibilidad durante la formulaci贸n del proyecto de inversi贸n de una planta de generaci贸n por ciclo combinado. En primer lugar, se propone una estrategia para determinar el horizonte operativo equivalente del sistema, que incluye el c贸mputo de las erogaciones en que se incurren debido a la operaci贸n en todo el conjunto de estados degradados que la planta atraviesa a lo largo de su vida 煤til. En segundo lugar, se propone incluir una funcionalidad entre disponibilidad y recursos asignados para mantenimiento, con objeto de asegurar que se podr谩 alcanzar la meta de generaci贸n fijada frente a las cambiantes condiciones que la planta debe afrontar. Luego, se analizan las mejoras obtenidas en los indicadores econ贸micos 贸ptimos del proyecto, observ谩ndose un incremento del atractivo de las opciones de inversi贸n generadas desde las etapas tempranas de dise帽o de la planta.Fil: Godoy, Ezequiel. UTN. FRRo. CAIMI; ArgentinaFil: Benz, Sonia Judith. UTN. FRRo. CAIMI; ArgentinaFil: Mart铆n, Victor. UTN. FRRo. CAIMI; ArgentinaPeer Reviewe

    Propuesta de mejora del proceso de costeo por tandas de producci贸n de l谩cteos en Coopebrisas R.L.

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    En el proyecto de TFIA en el cual se analiza el proceso de costeo de tandas de producci贸n en la Cooperativa de servicios m煤ltiples de Santa Rosa de Zarcero, Coopebrisas R.L. se ha producido gran cantidad de datos para lo cual es necesario tener una correcta gesti贸n de los documentos generados.El adecuado ordenamiento de la informaci贸n es fundamental para el an谩lisis de los resultados, adem谩s es necesario administrar el acceso a los archivos para que ya sea por error o mala intenci贸n no lleguen a ser corrompidos.Tambi茅n es sustancial que la informaci贸n sea protegida de virus, borrado involuntario o alguna cat谩strofe imprevista.Por estas razones es que es de vital importancia la correcta gesti贸n de la informaci贸n generada en este proyecto.In the TFIA project in which the process of costing production batches in the Multiple Services Cooperative of Santa Rosa de Zarcero, Coopebrisas R.L. large amount of data has been produced for which it is necessary to have a correct management of the generated documents.The adequate ordering of the information is fundamental for the analysis of the results, in addition it is necessary to manage the access to the archives so that either by mistake or bad intention they do not become corrupted.It is also substantial that the information is protected from viruses, involuntary deletion or some unforeseen catastrophe.For these reasons it is of vital importance the correct management of the information generated in this project.UCR::Vicerrector铆a de Investigaci贸n::Sistema de Estudios de Posgrado::Ingenier铆a::Maestr铆a Profesional en Computaci贸n e Inform谩tic

    Multiperiod optimisation and strategic planning for chemical processes

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    Il tema 猫 l'ottimizzazione multiperiodale applicata a processi chimici, in particolare ottimizzazione dei livelli di scorte e pianificazione strategica

    Multiperiod optimization for the design and planning of multiproduct batch plants

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    This paper presents a general multiperiod optimization model, which simultaneously solves the design and planning decisions in multiproduct batch plants. Therefore, the trade-offs between both problems are taken into account as well as variations due to seasonal effects, demand patterns, etc. From the design point of view, the model is formulated considering batch and semicontinuous units, the allocation of intermediate storage, and structural decisions. Following the usual procurement policy, equipment is provided using discrete sizes. From the planning point of view, the formulation takes into account both products and raw materials inventories, product demands and raw materials supplies that vary seasonally in a multiperiod approach. The objective is the maximization of an economic function, which considers incomes, and both investment and operation costs. A plant that produces five oleoresins in seven stages is used to illustrate this approach.Fil: Moreno, Marta Susana. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas. Centro Cient铆fico Tecnol贸gico Conicet - Santa Fe. Instituto de Desarrollo y Dise帽o. Universidad Tecnol贸gica Nacional. Facultad Regional Santa Fe. Instituto de Desarrollo y Dise帽o; ArgentinaFil: Montagna, Jorge Marcelo. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas. Centro Cient铆fico Tecnol贸gico Conicet - Santa Fe. Instituto de Desarrollo y Dise帽o. Universidad Tecnol贸gica Nacional. Facultad Regional Santa Fe. Instituto de Desarrollo y Dise帽o; ArgentinaFil: Iribarren, Oscar Alberto. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas. Centro Cient铆fico Tecnol贸gico Conicet - Santa Fe. Instituto de Desarrollo y Dise帽o. Universidad Tecnol贸gica Nacional. Facultad Regional Santa Fe. Instituto de Desarrollo y Dise帽o; Argentin
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