Hey everyone, welcome to this lecture, what is the cause and effect diagram? Once a defect error or a problem has been identified and isolated for further study, we must begin to analyze potential causes of this undesirable effect. In situations where causes are not obvious, sometimes they are the cause and effect diagram is a formal tool frequently useful in identifying potential causes. The cause and effect diagram constructed by a quality improvement team assigned to identify potential problem areas of the toy car manufacturing process mentioned earlier is shown here. Let's look at the steps involved in constructing the cause and effect diagram. Gather the team of experts often called as subject matter experts define the problem or effect to be analyzed.
Preferably write it on the whiteboard where everyone can see. brainstorm the problem. Draw the effect box and the center line. Specify the major potential cost categories and join them as boxes connected to the center line. Identify the possible causes and classify them into the categories in step five. Create new categories if necessary.
Rank order the causes to identify those that seem most likely to impact the problem. take corrective actions. in analyzing the toy car manufacturing process. The team elected to lay out the major categories of defects as machines, materials, methods, man, measurement, and environment. brainstorm Session followed to identify the various sub causes in each of these major categories, and to prepare the diagram, then through discussion and the process of elimination, the group decided that materials and methods contained the most likely cause categories. Cause and Effect analysis is an extremely powerful tool.
A highly detailed cause and effect diagram can serve as an effective troubleshooting aid. Furthermore, the construction of a cause and effect diagram as a team experience tends to get people involved in attacking a problem rather than in a fixing blame. In this section, our focus will be on how to create the cause and effect diagram on Minitab and you will learn that in the next lecture.