Fish bone diagram

Fish bone Diagram

Fish bone diagram

When to Use a Fish bone Diagram
• When identifying possible causes for an issue.
• Especially when a team’s thinking tends to be ruts.

Fish bone Diagram Procedure

Materials needed: flip chart or whiteboard, marking pens.
1. Agree on an issue statement (effect). Write it at the middle right of the flipchart or whiteboard. Draw a box around it and draw a horizontal arrow running thereto.
2. Brainstorm the main categories of causes of the matter. If this is often difficult use generic headings:
(1) Methods
(2) Machines (equipment)

(3) People (manpower)
(4) Materials
(5) Measurement
(6) Environment
3. Write the categories of causes as branches from the most arrow.
4. Brainstorm all the possible causes of the matter. Ask: “Why does this happen?” As each idea is given, the facilitator writes it as a branch from the acceptable category. Causes are often written in several places if they relate to many categories.
5. Again ask “why does this happen?” about each cause. Write sub–causes branching off the causes. still ask “Why?” and generate deeper levels of causes. Layers of branches indicate causal relationships.
6. When the group runs out of thoughts, focus attention to places on the chart where thoughts are few.

Fish bone Diagram Example

This fish bone diagram was drawn by a producing team to do to know the source of periodic iron contamination. The team used the six generic headings to prompt ideas. Layers of branches show thorough brooding about the causes of the matter.


Fish bone Diagram
Fish bone Diagram



                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Fish bone Diagram Example

For example, under the heading “Machines,” the concept “materials of construction” shows four types of equipment then several specific machine numbers.
Note that some ideas appear in two different places. “Calibration” shows up under “Methods” as an element within the analytical procedure, and also under “Measurement” as a reason behind lab error. “Iron tools” are often considered a “Methods” problem when taking samples or a “Manpower” problem with maintenance personnel.

Create a Fish bone Diagram

Analyze process dispersion with this simple, visual tool. The resulting diagram illustrates the main causes and sub cases leading to an effect (symptom).

Process Flow Chart


The Process Flow chart provides a visible representation of the steps in a very process. Flow charts also are cited as Process Mapping or Flow Diagrams. Constructing a flow chart is usually one amongst the primary activities of a process improvement effort, due to the subsequent benefits:
1. Gives everyone a transparent understanding of the method
2. Helps to spot non-value-added operations
3. Facilitates teamwork and communication
4. Keeps everyone on the identical page
There are many symbols wont to construct a flow chart; the more common symbols are shown below:





If you have got Microsoft Word or Excel, you’ll access a gallery or symbols within the Auto shapes function, along with an outline of their use. The subsequent step is to spot the method steps and link them along with direction arrows.


Following is an example of a very simple flow chart for the process of getting out of bed in the morning:

You can make a flowchart more useful by adding information beside the boxes. This flowchart gives a far better description of the method once you know that the snooze bar gets hit thrice, postponing the inevitable by five minutes anytime.
For a more detailed flow chart example, see the Statistical Process Control module from the Toolbox.
As you develop your flow charting skills, rummage around for feedback loops and indirect consequences. in this way, you’ll move toward System Diagrams, which identify inter-relationships between activities additionally to the method flow. Constructing an advanced process in an exceedingly team setting requires communication, and might build team understanding.



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