# 7 QC Tools | 7 Basic Quality Tools | What are 7 QC Tools for Process Improvement?

➞**7 QC tools**is a systematic and scientific method for Problem Solving.

➞ It is used for solve 90% of shop floor problem very easily.

## 1) What are the 7 QC Tools for Process Improvement?

→**7 QC tools**are the systematic and scientific approach to the Problem Solving Technique.

→ It improves our workplace.

→ Can be used to solve 90% of workplace problems.

## 2) From Where did the 7 QC Tools come?

→ Primarily Kaoru Ishikawa introduced the

→ Ishikawa has known for the “Democratizing (Visual Aids/Symbols) Statistics”.

→ Good visual aids make statistical and quality control more comprehensive.

→ Dr. Kaoru Ishikawa was a professor of the engineering college at Tokyo University.

→ A flow chart is a visual representation tool for a process, therefore, the process easily illustrates the Internal and external operational boundaries.

**7 QC Tools.**→ Ishikawa has known for the “Democratizing (Visual Aids/Symbols) Statistics”.

→ Good visual aids make statistical and quality control more comprehensive.

→ Dr. Kaoru Ishikawa was a professor of the engineering college at Tokyo University.

## 3) Why we use The 7 QC Tools for Process Improvement?

→

→ The

→ It is used to examine the production process, identify the key issues, control fluctuations of product quality, and give solutions to avoid future defects.

**The****7 QC tools for Process Improvement**is a set of graphical techniques identified as being most helpful in troubleshooting issues related to quality.→ The

**7 QC tools**are fundamental instruments to improve the process and product quality.→ It is used to examine the production process, identify the key issues, control fluctuations of product quality, and give solutions to avoid future defects.

→ This facilitates the organization to resolve the basic problems.

→ A most likely organization uses the basic 7 QC Tools for quality improvements of Product, Process or Service.

→ These 7 QC tools are easy to understand and implement and they do not need complex analytical/ statistical competence, hence it is simple yet powerful.

→ A most likely organization uses the basic 7 QC Tools for quality improvements of Product, Process or Service.

→ These 7 QC tools are easy to understand and implement and they do not need complex analytical/ statistical competence, hence it is simple yet powerful.

## 4) The 7 QC Tools are:

- Flow Charts
- Cause and Effect Diagram (Fishbone diagram or Ishikawa Diagram)
- Checksheet
- Histogram
- Pareto Chart
- Scatter Diagram
- Control Chart

### ➤ [1] Flow Charts in 7 QC Tools:

→“Flowchart is a diagrammatic representation that illustrates the sequence of operation to be performed to get the desired result.”→ A flow chart is a visual representation tool for a process, therefore, the process easily illustrates the Internal and external operational boundaries.

#### ➥ Types of Flow Charts:

- Macro Flow Chart
- Mini Flow Chart
- Micro Flow Chart
- Matrix Flow Chart

→ “A diagram which represents a meaningful relationship between an effect and its causes are called the Cause & Effect Diagram."

→ Another name of Cause and effect diagram is a Fishbone Diagram or Ishikawa Diagram.

→ It guides concrete action and tracks the potential causes during an investigation of the effort to determine whether the item significantly contributes to the problem or not.

→ The purpose of a checklist is to summarize the data and a tally count of event occurrences.

→ A check sheet counts the number of occurrences of an event, such as defects or non-conformance.

→ Hence the Check Sheet is also called a "tally sheet ".

→ In many cases, a checklist will summarize countable data related to certain types of defects and will provide a rough graphical representation of wherein a part of the process, defects occurred.

→ Another name of Cause and effect diagram is a Fishbone Diagram or Ishikawa Diagram.

→ It guides concrete action and tracks the potential causes during an investigation of the effort to determine whether the item significantly contributes to the problem or not.

#### ➥ Different names of the Ishikawa Diagram:

- Fishbone Diagram
- Cause and effect diagram
- Herringbone diagram
- Cause and effect diagram, or
- Fishikawa

(Source: Wikipedia)

### ➤ [3] Check Sheet:

→ "Check Sheet**is a structured, prepared form for collecting and analyzing data."**→ The purpose of a checklist is to summarize the data and a tally count of event occurrences.

→ A check sheet counts the number of occurrences of an event, such as defects or non-conformance.

→ Hence the Check Sheet is also called a "tally sheet ".

→ In many cases, a checklist will summarize countable data related to certain types of defects and will provide a rough graphical representation of wherein a part of the process, defects occurred.

→ “Histogram

→ Karl Pearson introduced Histogram and it is a bar graph representing the frequency distribution on its every bar.

**is a type of bar chart representing the frequency distribution of the data from a process.”**→ Karl Pearson introduced Histogram and it is a bar graph representing the frequency distribution on its every bar.

→ The histogram is the best Frequency distribution tool.

→ A histogram is a pictorial representation of a set of data.

→ A histogram is a pictorial representation of a set of data.

#### ➥ Types of Histogram chart:

- Normal Distribution
- Skewed Distribution
- Double-Peaked or Bimodal
- Multipeaked or Multimodal
- Edge Peaked Histogram
- Truncated or Heart cut Histogram

### ➤ [5] Pareto Chart in 7 QC Tools:

→ "Pareto chart is a bar graph arranged in descending order of height from left to right”
→ It is a diagram that shows the order of the largest number of occurrences by item or by classes and the cumulative sum total.

→ Pareto Chart communicates the principle of 80:20, therefore the Pareto Chart is an 80:20 analysis chart.

→ The Pareto Chart also gives us information about Vital few from Trivial many, Hence, Pareto chart is "Vital few from Trivial many".

→ It states that 80% of an effect comes from 20% of the causes.

→ Pareto Chart communicates the principle of 80:20, therefore the Pareto Chart is an 80:20 analysis chart.

→ The Pareto Chart also gives us information about Vital few from Trivial many, Hence, Pareto chart is "Vital few from Trivial many".

→ It states that 80% of an effect comes from 20% of the causes.

### ➤ [6] Scatter Diagram:

→ “Scatter Diagram is used to study and identify the possible relationship between two variables”.
→ It is the best validation tool.

→ Most importantly, the control chart is a time series plot that is used to monitor a process over time.

→ It is a plot of a process characteristic, usually through time with statistically determined limits.

→ When used for process monitoring, it helps the user to determine the appropriate type of action to take on the process depending on a degree of variation in the process.

→ With comparing above all tool Control Chart is the best process forecasting tool.

➝

➝ It is a scientific approach for problem-solving.

➝ We can get an 80% result by applying 20% of the effort.

➝ Each tool has its own specialty for problem solving and analysis.

➝ It is very easy to understand, communicate and use by the shop floor operator.

#### ➥ Different names of the Scatter Diagram:

- Scatter Plot
- Scatter Graph
- Correlation Chart
- Scatter Chart
- Scatter Gram

#### ➥ Different correlation between two variables in the Scatter Diagram:

- Strong Positive
- Moderate Positive correlation
- Weak Positive correlation
- Strong Negative correlation
- Moderate Negative correlation
- Weak Negative correlation
- Random Pattern (No correlation)

### ➤ [7] Control Chart:

→ “Control chart is a type of run chart used for studying the process variation over time."→ Most importantly, the control chart is a time series plot that is used to monitor a process over time.

→ It is a plot of a process characteristic, usually through time with statistically determined limits.

→ When used for process monitoring, it helps the user to determine the appropriate type of action to take on the process depending on a degree of variation in the process.

→ With comparing above all tool Control Chart is the best process forecasting tool.

## 5) Benefits of the 7 QC Tools:

➝ It encourages the way of problem-solving and improvement.➝

**7 QC Tools**are very simple to use but it is very powerful.➝ It is a scientific approach for problem-solving.

➝ We can get an 80% result by applying 20% of the effort.

➝ Each tool has its own specialty for problem solving and analysis.

➝ It is very easy to understand, communicate and use by the shop floor operator.

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## 1 Comments

very good presentation skill and to the point explaination

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