Integrating the Theory of Constraints and Six Sigma: Process Improvement Implementation

Abstract

Businesses apply many management philosophies aiming to manage processes effectively, eliminate bottlenecks and improve their process performance. The most important of these philosophies are the Theory of Constraints and the Six Sigma. These are used separately in process improvement and performance enhancement in many businesses. Recently, an integration model approach of two philosophies has been examined in the literature in an effort to reduce their weaknesses and increase their strong effects. In the literature, three different approaches are identified for the integration model of Theory of Constraints and Six Sigma. In this study, the integration model of Jin, Abdul-Razzak, Elkassabgi, Zhou, & Herrera, ( 2009) was applied in an industrial enterprise in order to identify and eliminate the root causes of the decline in sales figures. It has been revealed that the integration model can help to identify and eliminate these root causes and how it benefits the business. As a result of the application, an improvement in production cost by 1.56% and 3.55% and an increase in σ value from 1.4 to 2.3 were determined. With this model, constraints in the production process were determined, managed and eliminated.

Sustainable Manufacturing through Systematic Reduction in Cycle Time

“…This is sustainable manufacturing because of enhancement of productivity, profitability, satisfaction, and [29]. The existing literature regarding TOC suggests it is useful in the service sector (such as tourism [76]) and in cost effectiveness through integration with Six Sigma [77]. The authors of this paper, with the evidence through the case study, established the usefulness of 'theory of constraints' for sustainability and further provide a use to practitioners along with accumulation of theoretical knowledge [78,79].…”

Aplicación de la teoría de restricciones en un proceso productivo con enfoque a la industria 4.0

“…Volver al paso uno. (Ekleş & Ay Türkmen, 2022) (Galvan Quispe, 2018) en el artículo "Incidencia de la Teoría de Restricciones en la Productividad de una Empresa Embotelladora de Gaseosas" plantea una Hipótesis sobre si la Teoría de Restricciones incrementa la productividad multifactorial de una empresa embotelladora de bebidas gaseosas, hace uso del método científico explicando y describiendo el proceso en mención, además utiliza una población del número de paquetes producidos por la empresa durante 1 año, tomando como muestra 1 mes antes y 1 mes después de la aplicación de teoría de restricciones, donde concluye que la productividad multifactorial si se ha incrementado en un 13% aproximadamente, así también la productividad de cada uno de los elementos fundamentales del proceso como mano de obra, materia prima y energía eléctrica.…”

“…El sistema de producción que se maneja en la empresa es de acuerdo con los requerimientos del cliente con un promedio de 60.000 piezas al mes. Este artículo se lo elabora con el propósito de aportar a la mejora del proceso productivo de la empresa mediante un enfoque de la ingeniería industrial e industria 4.0 (Ekleş & Ay Türkmen, 2022).…”