Propuesta de implementación de metodologías LEAN SIX SIGMA para la mejora de la cadena de suministro de una empresa constructora ubicada en la ciudad de Guayaquil

Abstract

The project aimed to propose the implementation of Lean Six Sigma methodologies to improve the supply chain of a construction company located in Guayaquil, focusing on inventory control, purchasing, warehousing, logistics, and material dispatch. The study was developed as applied research with a descriptive and explanatory scope, following a predominantly quantitative approach supported by direct observation, document review, and the measurement of operational indicators such as inventory accuracy, internal service level, cycle times, and the frequency of urgent purchases. The diagnosis revealed non-standardized records, variability in replenishment lead times, unnecessary movements within the warehouse, and partial deliveries to job sites, which generated waste, rework, and disruptions to schedule compliance. Based on these findings, a structured improvement proposal was designed under the DMAIC cycle, integrating Lean and Six Sigma tools oriented toward standardized internal requests, consistent material coding, physical organization through 5S, preventive controls in receiving and dispatch, replenishment through reorder points, and the gradual adoption of simple digital formats. The proposal enabled the estimation of positive impacts on operational efficiency, cost reduction linked to urgent procurement, shorter preparation times, and stronger material traceability, contributing to a more reliable and competitive management of the supply chain system.