Categoryissue 3-2026, publication

dr inż. Anna MAZUR – Politechnika Poznańska, ul. J. Rychlewskiego 2, 60-965 Poznań, Polska, e-mail: anna.mazur@put.poznan.pl
inż. Klaudia RAICH – Politechnika Poznańska, ul. J. Rychlewskiego 2, 60-965 Poznań, Polska
inż. Gabriela WASICKA – Politechnika Poznańska, ul. J. Rychlewskiego 2, 60-965 Poznań, Polska
inż. Weronika SOCHA – Tulplast Socha Sp. K., ul. Wiosenna 27, 62-021 Paczkowo, Polska

Received 13.05.2026. Accepted 19.05.2026

pp. 21-30

Abstract

Purpose: The purpose of the study is to present a quality improvement project for a car trailer fender using an integrated approach based on quality management tools and the Global 8D methodology.
Design/methodology/approach: The research was conducted in three stages, employing triangulation of data sources and analytical methods. The rese­arch process utilized tools such as the Ishikawa diagram, Pareto-Lorenz analysis, and relation diagram, while the conceptual and implementation phase involved a process diagram as well as Global 8D and 5S methodologies.
Findings/conclusions: It was demonstrated that the primary causes of defects were organizational factors and a lack of objective visual control. The im­plementation of the proposed corrective action plan – including a defect catalog, quality alerts, and standardized instructions and control cards – resulted in a reduction of the complaint rate for the analyzed product.
Research limitations: The article presents a case study of a single product within a specific plant, which limits the direct generalization of the results to the entire industry. It is suggested that future research be conducted to evaluate the long-term sustainability of the implemented solutions.
Practical implications: The presented solutions, such as quality alerts and the 8D report, constitute ready-to-implement best practices in proactive quality management that can be adopted by manufacturing enterprises.
Originality/value: The value of this study lies in demonstrating the synergy between traditional quality tools and the modern Global 8D methodology within the specific context of the automotive industry. The case study documents the effectiveness of proactive quality management in eliminating human errors.

Keywords

quality improvement, quality management, process standardization, Global 8D, 5S method

prof. dr hab. Tadeusz BORYS – Uniwersytet Zielonogórski, Instytut Nauk o Zarządzaniu i Jakości, ul. Podgórna 50, 65-246 Zielona Góra, Polska, e-mail: t.borys@wez.uz.zgora.pl

Received 2.06.2026. Accepted 9.06.2026

pp. 2-20

Abstract

Purpose: This article is the second part of the publication, in which I have attempted to present an extremely rich set of perspectives through which SELF­-destruction can be viewed as a multidimensional and interdisciplinary phenomenon. It is this multidimensionality that prompted me to present various approaches to the complex structure of human SELF-destruction in two thematically compact and at the same time complementary parts of viewing this phenomenon from different perspectives. In the first part [5] I divided the existing or postulated models of viewing SELF-destruction into two groups. In the first group of models, which dominates in theory and practice, the direction of implication from effect to cause is assumed, and that is why I have called them “reverse” models, in short – “from effect”, and in the second group, the opposite implication is assumed, the essence of which is explained by the cause-and-effect analysis. The preventive potential of the latter group of implications has led me to call these models “classic” (from cause to effect), or in short – “from the cause”. I also pointed out that the proposed division of models is essentially based on two different logics for explaining SELF-destruction. In this more analytical part, I have subordinated its content to the answers to the following three important questions for the quality of human life: (1) What are the existential symptoms of SELF-destruction? – i.e. what are the causes and effects at the first level of the cascade of human self-destruction; (2) what are the psychological symptoms of SELF-destruction? – i.e. what are the causes and effects at the second level; (3) what are the neurobiological symptoms of SELF-destruction ? – i.e. what are the causes and effects at the third level. The answers to these questions illustrate a cascade (stairs) that will reveal more specifically the next levels (layers) of the explanation of SELF-destruction in the proposed model from cause  to effect. It is this cascade of layers of SELF-destruction that will be the subject of the second part of this article.
Research methodology: In the article, as in the first part, I used the method of logical analysis in relation to models “from the cause” and a review of the literature, taking into account the interdisciplinarity of the phenomenon of SELF-destruction.
Cognitive value: The features of the cognitive novelty of this study should be seen primarily in the presented cascading and integrated approach to SELF-destruction, based on cause-and-effect analysis – an approach very rarely presented in the literature on the subject, in which a disintegrated view of the phenomenon of SELF-destruction prevails. This prompted me to present a deeper analysis of the cause-and-effect model of this phenomenon. In my opinion, it is a more perspective view than the “from the effect” model, because it takes as its starting point the original cause of SELF-destruction, which is existential in nature with a clear axiological context. It is from this highest level of the cascade that the other two levels – psychological and neurobiological – originate in the proposed three-modular approach. This enabled me to integrate the “from the cause” model with the “from the effect” model in the next step.
Conclusions: The main conclusions of the article are found in the final part of the essay in the form of several conclusions, referring to the previously formulated research questions.

Keywords

quality of life, SELF-DESTRUCTION, models, cause, effect