1. Compiled by Dicky Gumilang for Quality Management course @ UEU
Tujuh Alat Kualitas
Tujuh Alat
Histograms
Pareto Charts
Cause and Effect Diagrams
Run Charts
Scatter Diagrams
Flow Charts
Control Charts
141117
Compiled by Dicky Gumilang for Quality Management UEU

2. Compiled by Dicky Gumilang for Quality Management course @ UEU
141117
Compiled by Dicky Gumilang for Quality Management UEU

3. Compiled by Dicky Gumilang for Quality Management course @ UEU
141117
Compiled by Dicky Gumilang for Quality Management UEU

4. Ishikawa’s Basic Tools of Quality
Kaoru Ishikawa developed seven basic visual tools of quality so that the average person could analyze and interpret data.
Collecting data, analyzing data, identifying root causes, and measuring the results.
These tools have been used worldwide by companies, managers of all levels and employees.
Kaoru Ishikawa is known for “democratizing statistics.” Since statistical concepts are not that easy to grasp, he created ways for the average person to obtain knowledge in statistics.
141117
Compiled by Dicky Gumilang for Quality Management UEU

5. Compiled by Dicky Gumilang for Quality Management course @ UEU
Histograms Slide 1 of 3
Histogram
Histogram adalah grafik batang (bar) yang menunjukkan frekwensi data.
Histogram alat yang paling mudah untuk mengevaluasi distribusi data.
Histograms suggest the nature of and possible improvements for physical mechanisms at work in progress.
141117
Compiled by Dicky Gumilang for Quality Management UEU

6. Compiled by Dicky Gumilang for Quality Management course @ UEU
Histograms Slide 2 of 3
Membuat Histogram
Kumpulkan data dan susun ke dalam kategori.
Beri label data sebagai kumpulan data independen.
Karakteristik data yang dikelompokkan disebut sebagai variable independen.
Frekwensi data dari variable independen sebagai data dependen.
Setiap tanda pada sumbu datar (axis) memiliki lebar yang sama.
Untuk setiap katagori hitung frekwensinya.
141117
Compiled by Dicky Gumilang for Quality Management UEU

7. Compiled by Dicky Gumilang for Quality Management course @ UEU
Histograms Slide 3 of 3
Examples of How Histograms Can Be Used
Histograms can be used to determine distribution of sales.
Say for instance a company wanted to measure the revenues of other companies and wanted to compare numbers.
Perhaps the company wants to compare numbers of companies that make from ; from 10,000-20,000; from 20,000-30,000; and so on.
141117
Compiled by Dicky Gumilang for Quality Management UEU

8. Compiled by Dicky Gumilang for Quality Management course @ UEU
Pareto Slide 1 of 4
Grafik Pareto
Digunakan untuk mengidentifikasi dan menentukan prioritas masalah yang akan dipecahkan.
Berupa histograms yang menerapkan aturan 80/20 yang dikembangkan oleh Joseph Juran.
Ingat aturan 80/20 yang menjelaskan bahwa sekitar 80% masalah disebabkan oleh sekitar 20% penyebab.
This is the economic concept that Juran applied to quality problems. The meaning behind that 80/20 rule is that there are vital few causes that create the problems.
141117
Compiled by Dicky Gumilang for Quality Management UEU

9. Compiled by Dicky Gumilang for Quality Management course @ UEU
Pareto Charts Slide 2 of 4
Constructing a Pareto Chart
First, information must be selected based on types or classifications of defects that occur as a result of a process.
The data must be collected and classified into categories.
Then a histogram or frequency chart is constructed showing the number of occurrences.
The steps used in Pareto analysis include gathering categorical data, drawing the histogram, and concentrating on the tall bars.
141117
Compiled by Dicky Gumilang for Quality Management UEU

10. Compiled by Dicky Gumilang for Quality Management course @ UEU
Pareto Charts Slide 3 of 4
An Example of How a Pareto Chart Can Be Used
Pareto Charts are used when products are suffering from different defects but the defects are occurring at a different frequency, or only a few account for most of the defects present, or different defects incur different costs. What we see from that is a product line may experience a range of defects. The manufacturer could concentrate on reducing the defects which make up a bigger percentage of all the defects or focus on eliminating the defect that causes monetary loss.
Actual chart is on the next slide
Example and chart were obtained from:
<
Data should be analyzed in two cases. The manufacturer could concentrate on reducing the defects that make up a bigger percentage of all the defects or they could concentrate on the defect that is costing them the most money. As part of the analysis, look at the tallest bars when trying to solve the problem.
141117
Compiled by Dicky Gumilang for Quality Management UEU

11. Compiled by Dicky Gumilang for Quality Management course @ UEU
Pareto Charts Slide 4 of 4
Concentrating on reducing defects A, B and C since they make up 75% of all defects. Or focus on eliminating defect E, if defect E causes 40% of monetary loss.
141117
Compiled by Dicky Gumilang for Quality Management UEU

12. Cause and Effect Diagrams Slide 1 of 4
Juga disebut diagram Ishikawa atau diagram tulang ikan (fishbone diagram).
Alat untuk menemukan semua kemungkinan penyebab untuk suatu efek atau masalah.
Sebagai langkah awal dalam penyelesaian masalah dengan menemukan semua kemungkinan penyebab.
This tool helps workers spend time on concentrating on the causes of problems rather than focusing on improving the indications of problems.
141117
Compiled by Dicky Gumilang for Quality Management UEU

13. Cause and Effect Diagrams Slide 2 of 4
Constructing a Cause and Effect Diagram
First, clearly identify and define the problem or effect for which the causes must be identified. Place the problem or effect at the right or the head of the diagram.
Identify all the broad areas of the problem.
Write in all the detailed possible causes in each of the broad areas.
Each cause identified should be looked upon for further more specific causes.
View the diagram and evaluate the main causes.
Set goals and take action on the main causes.
This is called the fishbone diagram because it looks like the skeleton of a fish. The problem is the head, the major causes of a problem are the “ribs”, and the detailed causes are the small bones.
141117
Compiled by Dicky Gumilang for Quality Management UEU

14. Cause and Effect Diagrams Slide 3 of 4
An Example of When a Cause and Effect Diagram Can Be Used
This diagram can be used to detect the problem of incorrect deliveries.
Diagram on next slide
Diagram obtained from: <
When a production team is about to launch a new product, the factors that will affect the final product must be recognized. The fishbone diagram can depict problems before they have a chance to begin.
The effect being examined is normally an aspect of product or service quality.
141117
Compiled by Dicky Gumilang for Quality Management UEU

15. Cause and Effect Diagrams Slide 4 of 4
Diagram of the Incorrect Deliveries Example:
You continue the process of branching off into more and more directions until every possible cause has been identified. The final result will represent a pile of all the factors relating to the effect being explored and the relationships between them.
141117
Compiled by Dicky Gumilang for Quality Management UEU

16. Compiled by Dicky Gumilang for Quality Management course @ UEU
You continue the process of branching off into more and more directions until every possible cause has been identified. The final result will represent a pile of all the factors relating to the effect being explored and the relationships between them.
141117
Compiled by Dicky Gumilang for Quality Management UEU

17. Compiled by Dicky Gumilang for Quality Management course @ UEU
You continue the process of branching off into more and more directions until every possible cause has been identified. The final result will represent a pile of all the factors relating to the effect being explored and the relationships between them.
141117
Compiled by Dicky Gumilang for Quality Management UEU

18. Scatter Diagrams Slide 1 of 4
Digunakan untuk mempelajari dan menentukan kemungkinan relasi (hubungan) antara perubahan dua variable data berbeda yang diamati.
These relationships are can be used to recognize indicator variables in organizations.
141117
Compiled by Dicky Gumilang for Quality Management UEU

19. Scatter Diagrams Slide 2 of 4
Constructing a Scatter Diagram
First, collect two pieces of data and create a summary table of the data.
Draw a diagram labeling the horizontal and vertical axes.
It is common that the “cause” variable be labeled on the X axis and the “effect” variable be labeled on the Y axis.
Plot the data pairs on the diagram.
Interpret the scatter diagram for direction and strength.
The X variable is independent and the Y variable is dependent.
141117
Compiled by Dicky Gumilang for Quality Management UEU

20. Scatter Diagrams Slide 3 of 4
An Example of When a Scatter Diagram Can Be Used
A scatter diagram can be used to identify the relationship between the production speed of an operation and the number of defective parts made.
A scatter diagram is used for confirming instincts about a cause-and-effect relationship between types of variables.
141117
Compiled by Dicky Gumilang for Quality Management UEU

21. Scatter Diagrams Slide 4 of 4
An Example of When a Scatter Diagram Can Be Used (cont.)
Displaying the direction of the relationship will determine whether increasing the assembly line speed will increase or decrease the number of defective parts made. Also, the strength of the relationship between the assembly line speed and the number of defective parts produced is determined.
Example obtained from: <
Scatter diagrams are also used to display the direction of the relationship and displaying the strength of the relationship.
141117
Compiled by Dicky Gumilang for Quality Management UEU

22. Compiled by Dicky Gumilang for Quality Management course @ UEU
Flow Charts Slide 1 of 3
Flow Charts
Representasi dalam bentuk gambar yang menunjukkan seluruh langkah dari suatu proses.
Flow charts define and analyze processes. They build a step-by-step picture of the process for analysis, discussion, or communication purposes.
141117
Compiled by Dicky Gumilang for Quality Management UEU

23. Compiled by Dicky Gumilang for Quality Management course @ UEU
Flow Charts Slide 2 of 3
Creating a Flow Chart
First, familiarize the participants with the flow chart symbols.
Draw the process flow chart and fill it out in detail about each element.
Analyze the flow chart. Determine which steps add value and which don’t in the process of simplifying the work.
Some examples of simple symbols are: the shape of a diamond symbolizes decisions, a parallelogram represents input or output, the rectangle is the processing symbol, an arrow for flow line and so forth.
141117
Compiled by Dicky Gumilang for Quality Management UEU

24. Compiled by Dicky Gumilang for Quality Management course @ UEU
Flow Charts Slide 3 of 3
Examples of When to Use a Flow Chart
Two separate stages of a process flow chart should be considered:
The making of the product
The finished product
Flow charts are used to define, standardize, or find areas for improvement in a process.
141117
Compiled by Dicky Gumilang for Quality Management UEU

25. Compiled by Dicky Gumilang for Quality Management course @ UEU
Flow Charts Slide 3 of 3
Flow charts are used to define, standardize, or find areas for improvement in a process.
141117
Compiled by Dicky Gumilang for Quality Management UEU

26. Compiled by Dicky Gumilang for Quality Management course @ UEU
Run Charts Slide 1 of 3
Run Charts
Digunakan untuk menganalisis proses sesuai urutan waktu.
Run charts are useful in discovering patterns that occur over time.
141117
Compiled by Dicky Gumilang for Quality Management UEU

27. Compiled by Dicky Gumilang for Quality Management course @ UEU
Run Charts Slide 2 of 3
Creating a Run Chart
Gathering Data
Some type of process or operation must be available to take measurements for analysis.
Organizing Data
Data must be divided into two sets of values X and Y. X values represent time and values of Y represent the measurements taken from the manufacturing process or operation.
Charting Data
Plot the Y values versus the X values.
Interpreting Data
Interpret the data and draw any conclusions that will be beneficial to the process or operation.
When measuring data, the measurements must be taken over time and in sequential order.
When plotting the values, use an appropriate scale that will make the points on the graph visible.
141117
Compiled by Dicky Gumilang for Quality Management UEU

28. Compiled by Dicky Gumilang for Quality Management course @ UEU
Run Charts Slide 3 of 3
An Example of Using a Run Chart
An organization’s desire is to have their product arrive to their customers on time, but they have noticed that it doesn’t take the same amount of time each day of the week. They decided to monitor the amount of time it takes to deliver their product over the next few weeks.
By using a run chart, the organization can determine which day or days it is taking longer to deliver and can allow themselves more time for on-time delivery.
141117
Compiled by Dicky Gumilang for Quality Management UEU

29. Control Charts Slide 1 of 3
Digunakan untuk menentukan apakah suatu proses akan menghasilkan produk atau jasa dengan karakteristik (property) yang dapat diukur dengan konsisten.
The process for developing a process chart is the same for almost all charts. The statistical computations is what makes it different and sometimes more complicated.
141117
Compiled by Dicky Gumilang for Quality Management UEU

30. Control Charts Slide 2 of 3
Steps Used in Developing Process Control Charts
Identify critical operations in the process where inspection might be needed.
Identify critical product characteristics.
Determine whether the critical product characteristic is a variable or an attribute.
Select the appropriate process control chart.
Establish the control limits and use the chart to monitor and improve.
Update the limits.
A variable is a continuous measurement. An attribute is the result of a binomial process that results in an either-or situation.
141117
Compiled by Dicky Gumilang for Quality Management UEU

31. Control Charts Slide 3 of 3
An Example of When to Use a Control Chart
Counting the number of defective products or services
Do you count the number of defects in a given product or service?
Is the number of units checked or tested constant?
Control charts focus more on acceptable limits of the process.
141117
Compiled by Dicky Gumilang for Quality Management UEU

32. Compiled by Dicky Gumilang for Quality Management course @ UEU
Activity
Process Flow Chart for Finding the Best Way Home
Construct a process flow chart by making the best decisions in finding the best route home.
Refer to the prior notes on flowcharts.
Remember: Define and analyze the process, build a step-by step picture of the process, and define areas of improvement in the process.
Answer is on the next slide
Example obtained from: <
141117
Compiled by Dicky Gumilang for Quality Management UEU

33. Compiled by Dicky Gumilang for Quality Management course @ UEU
141117
Compiled by Dicky Gumilang for Quality Management UEU

34. Compiled by Dicky Gumilang for Quality Management course @ UEU
Summary
This presentation provided learning material for each of Ishikawa’s seven basic tools of quality.
Each tool was clearly defined with definitions, a step-by-step process and an example of how the tool can be used.
As seen through the presentation, these tools are rather simple and effective.
141117
Compiled by Dicky Gumilang for Quality Management UEU

35. Compiled by Dicky Gumilang for Quality Management course @ UEU
Works - Cited
Histograms and Bar Graphs. <
Your MBA: The Business Study Reference Site.
Hci Home Services. Cause and Effect Diagram.
Scatter Diagram.
Flowchart. <
Run Charts/Time Plot/ Trend Chart. <
Foster Thomas S. Managing Quality An Integrative Approach. New Jersey: Prentice Hall, 2001
141117
Compiled by Dicky Gumilang for Quality Management UEU