Companies are in constant search of greater productivity and better use of resources; however, they have neglected the human being. In this regard, it is important to analyze the presence of the psychosocial factors to which workers are exposed at all levels. These factors exert both a positive and a negative influence and indeed turn into a risk when they are not in balance with worker capabilities. This literature review aims to provide a comprehensive understanding of the psychosocial factors present in the manufacturing industries. The methodology consisted of conducting a search in two databases in addition to government pages. A combination of keywords was used for the search, and each publication was classified according to the factors analyzed, the type of evaluation, and the area of application. Out of all 2,468 publications found, eight were selected. Finally, work-related psychosocial factors were found to be the most analyzed.

We propose a methodology for determination of Allowance Time (AT), based on heart rate and work sampling of a production line composed of thirteen stations operated by four workers. The current production line presents a high rate of personnel turnover and absenteeism and with an AT value established by the company of 6.3%. The AT determination is of critical importance, given that through this the workers need to maintain their work rhythm at 100% during the entire workday without fatigue. The resulting allowance after the study was 15% instead of 6.3%, increasing the standard time and causing a decrease in personnel turnover and absenteeism and consequently increasing the production capacity and the reduction of costs.

Quality has become one of the most important consumer decision factors for product and service selection. The phenomenon is widespread, regardless of whether the consumer is an individual, an industrial organization, a retail store, a bank or financial institution, etc. Consequently, understanding and improving quality are key factors leading to business success, growth and improved competitiveness.

The purpose of this work is to optimize the fracture resistance of the EPS parts used in the packaging of electronic products by using iterative DE-Experiment Design, as a more effective methodology to improve the performance of the productive processes than when It is done in isolation. The iterative DE was applied in a process of molding polyethylene pieces (EPS) in three stages: selection, modeling and optimization. In the selection stage the most important factors of the process were determined; in the modeling stage he determined how the important factors affect the process and in the optimization stage the optimum levels were established. Keeping the process operating within the ranges obtained brought with it a better control of the process with the following benefits: Reduction of the cycle time in 26.6. %; Reduction of the extra monthly time in 77%, and Reduction of charges for returns of rejected products in 85%. Keywords: Process Improvement Strategy, Design of Iterative Experiments, Optimization of packaging resistance.