Thesis Propuesta de un modelo para la optimización del presupuesto de reposición de una empresa manufacturera de papeles para el mercado de consumo masivo
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Date
2014-08
Authors
Journal Title
Journal ISSN
Volume Title
Program
Ingeniería Civil Industrial
Departament
Campus
Campus Santiago Vitacura
Abstract
El Proyecto de Memoria genera una alternativa que permite hacer más eficiente el proceso de dotación de personal, a través de la creación de un método robusto de cálculo de Horas Hombre empleadas en el proceso de reposición y posteriormente, un modelo matemático de optimización, que considera las características, reglas y políticas de la Empresa, y cumple con todas las restricciones laborales. El problema radica en que, actualmente la Empresa realiza las asignaciones de personal en base a un indicador de ventas desactualizado, y a criterios subjetivos, que varían en relación a la exigencia individual de cada local, y debido a esto se conoce si el proceso de asignación es eficiente. La creación del método de cálculo considera todas las actividades desarrolladas en el proceso de reposición, y a su vez los parámetros y variables que afectan en los tiempos de ejecución. La creación del modelo de optimización se respalda con la vasta literatura existente, que aborda áreas como el “Nurse Scheduling”, asignación de vuelos o problemas de transporte, con métodos Meta heurísticos, Heurísticos y de Programación Matemática, donde este último método de resolución fue el escogido para desarrollar el Proyecto. Se implementa el modelo computacionalmente utilizando el complemento del software Microsoft Excel, “Solver”. Además se utilizan Macros como herramienta complementaria, con el fin de simplificar y hacer más rápido el procesamiento del modelo. La potencialidad del nuevo modelo radica en que, a diferencia del actual, fue construido considerando todas las variables y parámetros asociados al proceso de reposición, con la inclusión de un período de inducción del mismo proceso, para cada sala por separado. Por lo tanto es capaz de revisar cada caso por separado para determinar la mejor solución. Acorde a esto se determina que en el escenario de menor costo social, existe un mejor aprovechamiento de los recursos existentes. El costo estimado para la implementación del nuevo modelo de dotación recae netamente en las posibles indemnizaciones a Mercaderistas, producto de la nueva distribución de personal. En los otros escenarios, donde la solución radica en disminución de personal, el costo por indemnización puede ser mayor, pero a su vez muy inferior al ahorro que se generaría en los costos por dotación de Mercaderistas producto de esto, por lo cual es altamente factible su implementación.
This Project generates an alternative that allows streamlining the staffing process, through the creation of a robust method for calculating man hours used in the replenishment process and subsequently, a mathematical optimization model that considers characteristics, rules and policies of the Company and meets all labor restrictions. The problem is that, currently the Company makes staff assignments based on an indicator of outdated sales, and subjective criteria, which vary in relation to the individual requirements of each POS, and because it is not known whether the staffing process is efficient. The creation of the calculation method considers all activities in the replenishment process and in turn the parameters and variables that affect the execution time. The creation of the optimization model is supported by the vast literature that addresses areas such as "Nurse Scheduling" allocation of flights or transportation, with Met heuristic methods, Heuristic and Mathematical Programming, where the latter was the method of resolution chosen to develop the Project. Computationally model using Microsoft Excel Plugin, "Solver" software is implemented. Macros are also used as a complementary tool, in order to simplify and expedite the processing model. The potential of the new model is that, unlike the present one, was built considering all the variables and parameters associated with the replenishment process, with the inclusion of an induction period of the same process for each room separately. Therefore it is able to review each case individually to determine the best solution. Accordingly it is determined that at least social cost scenario, there is a better use of existing resources. The estimated cost to implement the new model of provision falls neatly into possible compensation from marketers, product distribution of the new staff. In other scenarios, where the solution is decreased personnel costs for compensation may be higher, but in turn much lower than the savings generated costs for provision of marketers product of this, so it is highly feasible implementation.
This Project generates an alternative that allows streamlining the staffing process, through the creation of a robust method for calculating man hours used in the replenishment process and subsequently, a mathematical optimization model that considers characteristics, rules and policies of the Company and meets all labor restrictions. The problem is that, currently the Company makes staff assignments based on an indicator of outdated sales, and subjective criteria, which vary in relation to the individual requirements of each POS, and because it is not known whether the staffing process is efficient. The creation of the calculation method considers all activities in the replenishment process and in turn the parameters and variables that affect the execution time. The creation of the optimization model is supported by the vast literature that addresses areas such as "Nurse Scheduling" allocation of flights or transportation, with Met heuristic methods, Heuristic and Mathematical Programming, where the latter was the method of resolution chosen to develop the Project. Computationally model using Microsoft Excel Plugin, "Solver" software is implemented. Macros are also used as a complementary tool, in order to simplify and expedite the processing model. The potential of the new model is that, unlike the present one, was built considering all the variables and parameters associated with the replenishment process, with the inclusion of an induction period of the same process for each room separately. Therefore it is able to review each case individually to determine the best solution. Accordingly it is determined that at least social cost scenario, there is a better use of existing resources. The estimated cost to implement the new model of provision falls neatly into possible compensation from marketers, product distribution of the new staff. In other scenarios, where the solution is decreased personnel costs for compensation may be higher, but in turn much lower than the savings generated costs for provision of marketers product of this, so it is highly feasible implementation.
Description
Keywords
Presupuesto de reposición, Manufacturera de papeles, Mercado de consumo masivo
