Browsing by Author "Colina Morles, Eliezer Null"

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A Software Platform for Processes-Based Cost Analysis in the Assembly Industry
(Springer, 2019) Sigcha Quezada, Erik Alejandro; Colina Morles, Eliezer Null; Morocho Zurita, Carlos Villie; Sigüenza Guzmán, Lorena Catalina; Morocho Zurita, Carlos Villie
Processes and resources management are important current discussions related to decision making in the industrial field. This fact motivates companies to search for management models to improve their processes and services continuously. In order to achieve this purpose, approaches such as Business Process Management (BPM) and Time-Driven Activity-based Costing (TDABC) are used as bases for models design. This article describes the validation process of a software platform constructed using Business Process Model and Notation (BPMN) and TDABC paradigms aimed at analyzing processes costs in assembly companies. This work contemplates a description of the methodologies applied, functionalities implemented and validations steps performed. The platform also serves to generate process diagnosis in assembly companies prior to full BPM implementation.
Análisis de tiempos estándar en empresas de ensamble como insumo para la toma de decisiones
(2020) Apolo Aguilar, María Daniela; Guamán Guachichullca, Noé Rodrigo; Colina Morles, Eliezer Null; Luzuriaga Andrade, Mara Alejandra; Sigüenza Guzmán, Lorena Catalina
The small and medium-sized business sector has been gaining ground in the production of goods and services worldwide, creating a highly competitive environment that forces to improve their decisions to increase productivity and organizational efficiency. A handy tool to achieve these improvements is the study of methods and times, oriented to provide information about processes, time spent in operations, as well as the calculation and improvement of standard times for the optimization of processes and costs. This article describes a procedure for obtaining standard times in operational, strategic, and support processes in four assembly companies: televisions, printed circuit boards, motorcycles, and bicycles. The times obtained in the operational processes were validated through comparisons with results reported in the specialized literature, while the times associated with administrative, strategic, and support processes were analyzed internally for the case studies considered.
Levantamiento de procesos como base para la aplicación de sistemas de costeo basado en actividades en empresas de ensamblaje
(2019) Benavidez Vera, Erika Xiomara; Segarra Farfán, Erika Maricela; Colina Morles, Eliezer Null; Sigüenza Guzmán, Lorena Catalina; Arcentales Carrión, Rodrigo Nicanor
This work proposes process mapping as a starting point for the application of a costing system based on activities, with evidence gathered in two assembly lines, one manual and the other semi-automated. For this purpose, data are collected through empirical observation techniques and individual interviews. Afterwards, this information is transferred to process sheets under ISO 9001 standard and BPMN notation (Business Process Model and Notation) and analyzed by means of statistical techniques. As a result, it was possible to identify and group the processes, subprocesses and activities carried out with the same resources, achieving determining the time required for each process according to their characteristics, as well the number of repetitions corresponding to the activities. As a conclusion, this work allowed to verify that work that is it possible to accomplish a deep costs analysis related to strategic, operational and support processes, by mean of an activity-based system which permits analyzing and determining costs based upon critical processes, looking their optimization for a better performance of the organization.
Levantamiento de procesos en industrias de ensamblaje de bicicletas usando BPMN e ISO
(Universidad Técnica del Norte, 2018) Castro Cambizaca, José Fernando; Rodas Gavilánes, Jessica Priscila; Colina Morles, Eliezer Null; Sigüenza Guzmán, Lorena Catalina; Arcentales Carrión, Rodrigo Nicanor; Castro Cambizaca, José Fernando
Currently, the organizational structure of companies has determined changes in their concept, defining all organizations as a network of interconnected and interrelated processes in order to maximize customer satisfaction. Given this, a process-based approach eliminates traditional departmental barriers, changing functional and individual vision by departments to a global vision that reveals how macro processes are related to each other. The purpose of this study is to describe the development of strategic, operational and supporting processes of a bicycle assembly company, in order to have a detailed knowledge of the current situation of the organization. To meet this objective, the processes were first identified through interviews and observations. The information was documented in process sheets based on the ISO 9001 standard and flow diagrams using BPMN notation. Finally, the critical subprocesses were established through statistical analysis, finding, for example, that the critical subprocess in the assembly of bicycles is painting. In total, 395 subprocesses and 3363 activities were executed. The main conclusion is that the mapping of processes allows to efficiently and effectively manage the resources allocated for each activity, reducing costs and maximizing profits.
Management tools for process mapping and modeling in assembly industry
(978-303094261-8, 2022) Arcentales Carrión, Rodrigo Nicanor; Colina Morles, Eliezer Null; Sucozhañay Calle, Dolores Catalina; Duran, Regina; Sigüenza Guzmán, Lorena Catalina
In a highly globalized world affected by economic policies and a latent COVID-19 pandemic, companies need to organize or reorganize to achieve efficient operations. The correct management of organizations has led their administrators to adopt resourceful management models that guide their activities towards fulfilling their objectives. Thus, management tools have been presented as an effective alternative to control processes and activities. According to a previous study, the main tools that allow process mapping and modeling are Business Process Management (BPM), Business Process Reengineering (BPR), and Event Process Chain (EPC). This article analyzes their characteristics based on compatibility and affinity with four case studies dedicated to the assembly industry using this previous study. In addition, the advantages and disadvantages of the three tools related to the possible adaptability in the four companies are studied. This work uses qualitative qualification matrices, which answer specific questions, determine the potential improvement of organizational management, and create a methodology for mapping and modeling processes.
Mathematical model based on linear programming and fuzzy logic for time prediction in bicycle assembly industries
(Pontificia Universidad Católica del Ecuador, 2019) Rodas Durán, Pedro Javier; Guamán Guachichullca, Noé Rodrigo; Colina Morles, Eliezer Null; Peña Ortega, Mario Patricio; Sigüenza Guzmán, Lorena Catalina; Rodas Durán, Pedro Javier
In the assembly industry, there is a high degree of uncertainty when identifying operational problems, due to limited resources and inefficient production control. Focusing on the assembly of bicycles, this article presents a model that combines linear programming and fuzzy logic to obtain standard times associated with the production lines of bicycles. The tool used for minimizing the objective function was Excel "Solver", and its formulation involved the identification of variables, restrictions, constant parameters, working conditions and production rates. The times obtained from the linear programming model entered as variables in the fuzzy logic model, to yield standard times estimates. This study allows an identification of the current state of the productive process, obtaining the maximum benefit in operative resources and working conditions. In addition, the model improves decision making through uncertainty control in production planning.
Mathematical modeling to standardize times in assembly processes: application to four case studies
(2021) Colina Morles, Eliezer Null; Peña Ortega, Mario Patricio; Morocho Zurita, Carlos Villie; Sigüenza Guzmán, Lorena Catalina
Purpose: This paper proposes model-based standard times estimates, using multiple linear regression, nonlinear optimization, and fuzzy systems in four real cases assembly lines. The work includes a description of the models and a comparison of their performance with values obtained using the conventional chronometer method. These models allow estimating standard times without reconducting field studies. Design/methodology/approach: For the development of the time study, the methodology applied by the International Labour Organization (ILO) was used as a baseline. This methodology is structured in three phases: selection of the case study, registration of the process by direct observation, and calculation/estimation of the standard time. The selected case studies belong to real assembly lines of motorcycles, television sets, printed circuit boards, and bicycles. Findings: In the motorcycle’s assembly case, the study allowed constructing seven linear regression models to estimate standard times for assembling the front parts, and seven linear regression models to predict standard times for the rear parts of the different motorcycle types. Compared to the classical chronometer method, the results obtained never exceeded 10%. Regarding the case studies of assembling TV sets and PCBs, the study considered the construction of nonlinear optimization models that allow making appropriate predictions of the standard times in their assembly lines. Finally, for the bicycle assembly line, a fuzzy logic model to represent the standard time was constructed and validated. Research limitations/implications: For reasons of confidentiality of information, this work omitted the names of companies, services, and models of manufactured products. Originality/value: The literature consulted does not refer to the representation of standard time on assembly lines using mathematical models. The construction of these models with empirical data from actual assembly lines was a valuable aid to the companies involved in supporting activity planning.
Prediction of standard times in assembly lines using least squares in multivariable linear models
(Springer, 2020) Ramírez Vargas, Jhon Sleiter; Guamán Guachichullca, Noé Rodrigo; Colina Morles, Eliezer Null; Sigüenza Guzmán, Lorena Catalina
Currently, the highly competitive environment of the assembly industries has been an engine for them to seek differentiating factors for improving their efficiency. One of these factors is the study of times and methods (referred to the analysis and the critical and systematic examination of how a task is presently performed, facilitating to find more effective methods), which allows alleviating internal and external aspects that affect productivity and provides the basis for management decision-making. The present work has two primary objectives; firstly, the calculation of standard times within the enterprise operative area and, additionally, the development of a mathematical model for time prediction. For the fulfillment of these purposes, a referential conceptual framework was established about the study of time and the multiple linear regression model. This framework allowed elaborating a procedure for the development of the mathematical prediction model, together with its validation. The study concludes with a discussion on the importance of having models to estimate standard times in business decision making, and the establishment of relevant conclusions.
Process mapping and modeling: a theoretical tool analysis
(2020) Arcentales Carrión, Rodrigo Nicanor; Colina Morles, Eliezer Null; Sucozhañay Calle, Dolores Catalina; Durán, Regina; Sigüenza Guzmán, Lorena Catalina
The technological development and continuous changes in economic policies have motivated looking for greater efficiency in all levels of an organization. Organizations include in their management improvements that facilitate the control of their processes and activities. In this sense, management tools for process mapping and modeling have a positive influence on the companies’ performance since their inclusion encourages the improvement and optimization of daily activities. However, there is evidence of disadvantages in the application of some adopted methods. This paper analyzes the weaknesses and strengths of the available management models and tools to cover three specific purposes. Firstly, exploring different tools and models for process mapping and modeling used in business management. Secondly, prioritizing tools that enable their integration with the ISO standard and process costing systems. Finally, establishing the advantages and disadvantages of prioritized tools, as well as their main characteristics. To this end, this work contemplates a theoretical analysis and comparison of the methods Business Process Management (BPM), Business Process Reengineering (BPR), and Event Process Chain (EPC).