Correct analysis of a malfunction is a very important step in the remediation process of a product. It is necessary to have a clear vision, especially to determine the cause of the malfunction, although sometimes it can be masked by other defects. Quality Management offers many classic and modern tools to help find solutions that ensure quality improvement. This paper presents a modern method of quality management, called the tree diagram, applied to the issue of increasing the reliability of the chain transmissions. The advantage of using this chart is that it offers the possibility of logically and chronologically examining the objectives and actions that solve a quality or non-quality problem. In the proposed case study, the overall objective is to increase the reliability of the chain transmissions. Specific objectives are set and for each specific objective, we identify potential solutions that can be adopted. For the proposed general objective, the following three specific objectives have been identified: Reduction of chain wheel wear and chain joints, Ensuring proper fitting, Adoption of optimal chain tensioning solutions. On the basis of the presented measures, the tree diagram was made on three levels. The tree chart made outlines the relationship between the overall goal pursued and the actions taken to achieve them. This tool can be used in planning and solving quality assurance problems in the case of the chain transmissions.

At present, increasing attention is paid to the quality of products and processes in different fields of activity. Currently, universities and other institutions with research activities scientifically, are increasingly concerned with the implementation of quality management through different one’s methods and tools. Quality Management provides a range of tools that can be used to find solutions when it comes to improving quality. In this paper the authors present a study on the tree diagram determination, for quality improvement the scientific research process. The important measures to be taken have been identified for the successful completion of a scientific research process. To increase the quality of the scientific research process, has grouped the identified measures and thus leads to an orientation to three specific objectives: the organization’s management adequately assures the necessary resources; the head of the research collective adequately organizes the research activity; the research collective chooses and applies an adequate research methodology on the theme. A measure from the third specific objective is considered to be a secondary objective, and for it specific actions are provided which constitute level 4 of the tree diagram. A diagram has been developed that includes: the general objective, the specific objectives, the measures identified for the achievement of the objects. The paper presents a tree diagram that can be used in the quality management within the frame of the organizations which desire to improve the quality of the scientific research activities. The use of this diagram offers the advantage to examine in a chronological and logical sense the causes which determine the quality of a scientific research process