Application of the D5 discipline from the G8D method in solving quality management problems for NOK parts
Joanna Cyganiuk1 (orcid id: 0000-0002-7279-0692)
Piotr Kuryło1 (orcid id: 0000-0001-9820-1254)
Ali Al-Zubiedy2 (orcid id: 0000-0002-2041-2737)
Magdalena Mazur3 (orcid id: 0000-0003-3515-8302)
1 University of Zielona Gora, Poland
2 University of Babylon, Iraq
3 Czestochowa University of Technology, Poland
DOI: 10.17512/bozpe.2025.14.06
Article (PDF)
KEYWORDS
G8D method, discipline D5, PCAs, escape point, root cause, quality management, process optimization
ABSTRACT
The article discusses what is the G8D method, focusing on the fifth discipline of this method, D5, which involves the selection and verification of permanent corrective actions for root causes and escape points. The rationale for applying the G8D method and using the D5 discipline of this method was analyzed for the case of a NOK part, specifically a part with an undrilled hole. The algorithm that must be applied to correctly go through all the steps of the D5 discipline has been presented, in order to obtain verified corrective actions both for
the point in the process where NOK parts are produced and for the control point where NOK was not detected. The practical application of this discipline for selected initial conditions (the transition through disciplines D0-D4), as well as the solution for the problem of producing defective products that protect the production system from further manufacturing of such parts has been presented. In construction literature, a similar approach is applied in the quality management of industrial prefabricates, where systematic defect analysis leads to the optimization of production processes. The applicability of the D5 discipline and the Poka Yoke method for securing the production station against the possibility of producing a NOK part was presented.
Politechnika Częstochowska uczelnią dostępną.
