Opp(Fish Bone)
- 1. Cause & Effects Diagram V1.0 07.26.09 1 2 Fishbone Diagram Measure Machinery Manpower 3 Problem Statement Problem Issue Manpower Person is late to work Mother Methods Materials 12% of days worked, Nature mainly occurs Monday. 4 Possible Causes Materials Machinery For clarity: one branch shown. Vehicle won’t Start on cold days Badge Reader causes huge backlog Complete Cause and Effect Measure Machinery Manpower Vehicle won’t start on cold days Badge Reader causes huge backlog I’m not sure what I like to have a leisurely breakfast. time I leave the house Carpool passengers Problem Issue are not ready on time. Person is late to work 12% of days worked, mainly occurs I follow the same I usually can’t recall where Monday I put the car keys. route everyday. My morning routine makes me run late Someone moves my Fog slows down I get gas on Tuesday badge overnight. Walk the dogs Iron a shirt my commute on the way in. Snow slows my commute Mother Methods Materials Nature One Page Primer Series Tony Webster Lean Sigma Professional www.linkedin.cominwebstert
- 2. Cause & Effects Diagram V1.0 07.26.09 What is it? Who Should Use It? Anyone who wants to improve their A visual snapshot of the collected value to their organization should learn knowledge of possible root causes; and become proficient at problem displayed using categories. solving methods. Why Use It? • Drives focus on causes, not symptoms. • Enables teams to focus on the problem at hand – not the history of the problem, or interpersonal dynamics. When Do I Use It? Fishbone diagrams are a simple tool that are used in early problem solving stages to brainstorm or review a list of possible root causes. Step Description 1 Draw the backbone and main branches. 2 Label the main branches of the fish with categories which will guide the process of generating possible root causes. (Use 6M’s or 5P’s on to label the branches.) 3 List the problem or issue to be investigated in the “head” of the fish. 4 Identify the factors within each category that may be affecting the problem/issue. The team should ask... "What are the <category> issues affecting/causing... <problem> Using a Completed Cause & Effect Diagram 5 Evaluate the fishbone to eliminate irrelevant or out of scope causes with respect to the problem statement. (ex. Fog is listed as a factor – but mostly likely does not occur mostly on Mondays) 6 Evaluate the remaining possible causes to establish consensus on factors that are the “most likely causes” . 7 Rank the most likely causes for impact on the problem, then develop and implement corrective actions for them in order of priority.