Cause Effect Fishbone Diagram

Procedure s
Faxes arrive 24 hours/day and 7 days/week People leave fax in different places Not always sure # of pages Separate faxes get combined People forget to distribute
Electrical outages Faxes hard to read Fax machine runs out of paper Electrical storms
Plant
Program
Planet

Princiishbone Diagram
1. What is a Fishbone Diagram?
It as a tool for demonstrating the relationship between cause and effect to a given problem/issue. It is also known as Ishikawa or a Cause & Effect diagram.
4. How do I use this lean principle?
A.
Get high agreement on the problem statement and define the effect that the problem is having. Once agreed upon document on the fishbone. Define the categories that will be used to challenge the causes that may be “triggering” the effect. □ TIP: Policies, Procedures, People, Plant,

C&D
People work from 8:00 a.m. – 5:00 p.m.
3. What factors are critical for Fishbone Diagram
success?
A defined problem statement and defined goal. A cross functional team (including those that work with the problem) is essential to challenge the current understanding of the effect. Only have one problem per fishbone diagram. Digging until you find the most likely causes(s) and then proving the relationship between the cause and the effect (systemic problem solving) and implementing countermeasure(s) Problem solving is visible and inclusive.
Plan t
Program
Planet
D.
2. Why use a Fishbone Diagram?
When presented with a problem we often do not have the facts to enable us to truly identify the root cause and we need a tool that will enable us to leverage the knowledge of our workforce and challenge the idea that we “know” wh at is happening without doing the proper investigation. This tool challenges us to look at the effect of the problem and explore the causes (however likely or unlikely they may appear to be). It enables a group with a diverse background/skills to determine what factors may be contributing to the effect and then enables the team to build off of each other as they brainstorm these potential causes. Through the visual “mapping” of the causes it enables the team to challenge the potential causes and determine the most likely causes(s) and develop countermeasures.
Plant shutdowns
C.
Electrical outages Faxes hard to read Fax machine runs out of paper Electrical storms
Brainstorm and list the causes that would most likely influence/trigger the effect. □ Use Post-It-Notes to write each input on. □ Note all possible and likely possible causes. Select the most likely root cause(s). □ Use a tool to down-select to the most likely
Future State Faxes not being received correctly or at all
Program and Planet are often used with administrative or transactional processes. □ Manpower/People, Machines, Methods/Process, Management, Measurement, and Materials when dealing with products.
Policies
People
Anybody picks up fax from machine
B.
People work from 8:00 a.m. – 5:00 p.m.
Fax and copier combined Faxes not always have cover page Incoming faxes fall on the ground
A
Future State Faxes not being received correctly or at all
Incoming faxes fall on the ground
Fax and copier combined Faxes not always have cover page
Plant shutdowns
cause(s). Multi-voting by the participants is most often used and reinforces the expertise that has been assembled. Utilize data where available to select most probable causes. □ Keep the list of potential causes as you may need to explore them if your verification of the causes you selected does not prove the linkage that you expect.
B
Policies Procedure s People
Anybody picks up fax from machine Faxes arrive 24 hours/day and 7 days/week People leave fax in different places Not always sure # of pages Separate faxes get combined People forget to distribute

E.
Take action to validate the linkage between the causes that you have selected and the effect. Once validated take the actions necessary to eliminate the causes and prevent the effect from reoccurring.