THE POWER OF THE NEW 7 QC TOOLS IN MODERN QUALITY MANAGEMENT

INTRODUCTION

In today’s highly competitive industrial environment, organisations are expected to achieve excellence not only in product quality but also in decision-making, strategic planning, cross-functional coordination and customer satisfaction. Traditional quality control techniques remain extremely valuable for operational problem-solving; however, modern business challenges often involve complex relationships, uncertainty, human behaviour and strategic interdependencies. To address these complexities, the New 7 QC Tools emerged as powerful management and planning instruments.

The New 7 QC Tools are widely utilised in Total Quality Management (TQM), policy deployment, project management, continuous improvement initiatives and strategic problem-solving. Unlike the traditional seven QC tools, which are primarily numerical and statistical, the New 7 QC Tools focus more on qualitative analysis, idea generation, systematic planning and management-level decision-making.

These tools help organisations convert abstract problems into structured action plans. They are especially useful when dealing with unstructured information, verbal data, brainstorming outcomes and organisational complexities.

UNDERSTANDING THE NEW 7 QC TOOLS

The New 7 QC Tools were developed in Japan to support management and planning activities. These tools are particularly effective when data is limited but managerial judgement, team participation and logical thinking are essential.

The seven tools are:

1. Affinity Diagram
2. Interrelationship Diagram
3. Tree Diagram
4. Matrix Diagram
5. Prioritisation Matrix
6. Process Decision Programme Chart (PDPC)
7. Activity Network Diagram

Each tool serves a unique purpose and supports systematic thinking.

AFFINITY DIAGRAM

The Affinity Diagram is used to organise a large number of ideas, opinions or issues into meaningful groups based on natural relationships.

During brainstorming sessions, teams often generate a vast amount of scattered information. The Affinity Diagram helps bring order to this confusion by clustering similar ideas together. This allows teams to identify major themes, hidden relationships and common concerns.

For example, if a company is analysing customer complaints, the complaints may initially appear unrelated. However, after grouping them through an Affinity Diagram, patterns may emerge such as delivery issues, communication gaps or product reliability concerns.

This tool promotes team participation and encourages collective thinking.

INTERRELATIONSHIP DIAGRAM

The Interrelationship Diagram helps identify cause-and-effect relationships among various factors involved in a complex problem.

Many organisational problems are interconnected. A single issue may simultaneously be both a cause and an effect. This tool visually represents these relationships using directional arrows.

By analysing the direction and number of arrows, teams can identify root causes, key drivers and major influencing factors. It helps management focus on high-impact areas rather than merely treating symptoms.

For instance, low employee morale may be connected to poor leadership, inadequate communication, excessive workload and lack of recognition. The Interrelationship Diagram helps reveal these relationships clearly.

TREE DIAGRAM

The Tree Diagram is used to break down broad objectives into progressively detailed tasks or actions.

This tool resembles the branches of a tree, starting from a central objective and extending into smaller, manageable activities. It provides clarity regarding what needs to be done at every level.

For example, if the objective is to improve customer satisfaction, the Tree Diagram may branch into product quality improvement, faster response time, employee training and digital customer support systems.

The Tree Diagram is extremely useful in strategic planning, policy deployment and project execution because it transforms goals into actionable steps.

MATRIX DIAGRAM

The Matrix Diagram establishes relationships between two or more groups of factors.

It helps organisations understand how different elements interact with one another. These elements may include departments, functions, customer requirements, product features or process characteristics.

One common application is in Quality Function Deployment (QFD), where customer expectations are linked with technical specifications.

The Matrix Diagram improves communication across departments and ensures alignment between organisational objectives and operational activities.

Its structured visual format enables teams to detect weak connections, missing responsibilities or areas requiring stronger coordination.

PRIORITISATION MATRIX

The Prioritisation Matrix is used to rank options based on defined criteria.

Organisations often face multiple opportunities, problems or improvement ideas simultaneously. Since resources are limited, prioritisation becomes essential.

This tool enables objective decision-making by assigning weights and scores to various alternatives. Factors such as cost, impact, urgency, feasibility and customer importance may be considered.

For example, if a company identifies ten improvement projects, the Prioritisation Matrix helps determine which projects should be implemented first for maximum benefit.

It reduces emotional bias and supports logical, data-driven decision-making.

PROCESS DECISION PROGRAMME CHART (PDPC)

The Process Decision Programme Chart, commonly known as PDPC, is a preventive planning tool.

It helps teams anticipate possible failures or obstacles during project implementation and develop contingency plans in advance.

Every plan carries uncertainties. PDPC encourages organisations to think proactively about “what could go wrong” and “how to respond if it does”.

For example, during a product launch, possible risks such as supplier delays, machine breakdowns or manpower shortages can be identified early. Preventive and corrective actions can then be planned accordingly.

PDPC strengthens risk management and improves preparedness.

ACTIVITY NETWORK DIAGRAM

The Activity Network Diagram is used for project scheduling and time management.

It identifies the sequence of activities required to complete a project and determines dependencies between tasks.

This tool helps organisations estimate project duration, identify critical activities and optimise resource utilisation. It is closely related to project management techniques such as Critical Path Method (CPM) and Programme Evaluation and Review Technique (PERT).

For example, while establishing a new manufacturing facility, multiple activities such as civil construction, machine installation, electrical work and manpower recruitment must occur in a coordinated sequence. The Activity Network Diagram helps ensure timely project completion.

BENEFITS OF USING THE NEW 7 QC TOOLS

The New 7 QC Tools offer several organisational benefits:

• They encourage systematic thinking.
• They improve team collaboration and communication.
• They support strategic planning and policy deployment.
• They simplify complex problems.
• They enhance decision-making quality.
• They promote proactive risk management.
• They strengthen continuous improvement culture.
• They support cross-functional integration.

These tools are especially effective when used collectively rather than individually.

APPLICATION OF THE NEW 7 QC TOOLS IN TQM

In Total Quality Management, the New 7 QC Tools play a significant role in achieving organisational excellence.

They support:

• Policy Management
• Cross-functional Management
• Daily Management
• Continuous Improvement
• Breakthrough Improvement Projects
• Customer Satisfaction Enhancement
• Strategic Quality Planning

Many organisations pursuing prestigious quality awards and business excellence models rely heavily on these tools to demonstrate structured management practices.

CHALLENGES IN IMPLEMENTATION

Although the New 7 QC Tools are highly effective, successful implementation requires organisational discipline and leadership commitment.

Some common challenges include:

• Lack of training
• Resistance to structured thinking
• Poor facilitation during brainstorming
• Insufficient cross-functional participation
• Incomplete understanding of tool applications

Therefore, organisations must invest in capability development and create a culture that values analytical thinking and teamwork.

CONCLUSION

The New 7 QC Tools are not merely quality tools; they are powerful management instruments that help organisations navigate complexity with clarity and confidence.

In a world driven by rapid technological change, customer expectations and competitive pressure, organisations require structured approaches for planning, analysis and decision-making. The New 7 QC Tools provide this structure.

When applied effectively, these tools improve organisational alignment, strengthen problem-solving capability and accelerate continuous improvement initiatives. They bridge the gap between strategy and execution while promoting a culture of participation, logic and systematic management.

Ultimately, organisations that master the usage of the New 7 QC Tools are better positioned to achieve operational excellence, customer trust and sustainable long-term success.

PARETO DIAGRAM PREPARATION AS PER JUSE GUIDELINE

INTRODUCTION

In the world of Total Quality Management, problem-solving must always be based on facts and priorities rather than assumptions and emotions. One of the most powerful tools that supports this philosophy is the Pareto Diagram.

The Pareto Diagram is one of the Seven Basic Quality Control Tools promoted extensively by Union of Japanese Scientists and Engineers (JUSE), the organization responsible for propagating Japanese quality management practices worldwide and administering the Deming Prize.

JUSE considers the Pareto Diagram not merely as a chart, but as a management prioritization tool that enables organizations to identify the “Vital Few” causes responsible for the majority of problems.

The principle behind the Pareto Diagram is based on the famous 80:20 rule.

80\%\ \text{of problems are often caused by} \ 20\%\ \text{of causes}

This principle helps management focus on the most important areas instead of spreading resources equally across all issues.

ORIGIN OF THE PARETO PRINCIPLE

The Pareto Principle originated from the observations of Italian economist Vilfredo Pareto, who noticed that approximately 80% of wealth in Italy was owned by 20% of the population.

Later, quality experts applied this concept in manufacturing and management systems and discovered that:

• A few causes create most defects
• A few machines create most breakdowns
• A few suppliers create most quality issues
• A few problems create most customer complaints

Japanese industries, especially companies like Toyota Motor Corporation, adopted Pareto analysis deeply within their TQM systems.

WHAT IS A PARETO DIAGRAM?

A Pareto Diagram is a special type of bar chart where:

• Categories are arranged in descending order
• Bars represent frequency or impact
• A cumulative percentage line is drawn
• The chart identifies the major contributors

The diagram visually separates:

• Vital Few
• Useful Many (or Trivial Many)

WHY JUSE EMPHASISES PARETO DIAGRAM

JUSE strongly believes that:

“Management must focus on priorities.”

Without prioritization:

• Resources get diluted
• Teams lose direction
• Improvement becomes slow
• Cost increases
• Results become insignificant

Pareto analysis enables organizations to:

• Focus correctly
• Use data-based decision making
• Improve productivity
• Reduce losses
• Accelerate improvement activities

OBJECTIVES OF A PARETO DIAGRAM

IDENTIFY MAJOR CONTRIBUTORS

The primary objective is to identify the few categories contributing to the majority of the problem.

Example:

• 2 defects may contribute 75% rejection.

PRIORITIZE IMPROVEMENT ACTIVITIES

Instead of improving everything simultaneously, organizations focus on:

• Highest impact areas first

This supports:

• Effective resource utilization
• Faster improvement
• Better ROI

SUPPORT FACT-BASED MANAGEMENT

JUSE philosophy emphasizes:

• Decisions must be based on actual data.

Pareto diagrams convert raw data into:

• Visual management information

SUPPORT PDCA ACTIVITIES

Pareto analysis is heavily used in:

• Plan
• Do
• Check
• Act cycles

It helps measure:

• Before improvement
• After improvement

COMPONENTS OF A PARETO DIAGRAM

A proper Pareto Diagram contains several important elements.

TITLE

The title must clearly mention:

• Subject
• Area
• Period

Example:

CUSTOMER COMPLAINT PARETO – APRIL 2025

X-AXIS

The X-axis contains:

• Categories of defects/problems

Example:

• Scratch
• Dent
• Crack
• Rust

LEFT Y-AXIS

The left vertical axis represents:

• Frequency
• Quantity
• Cost
• Downtime

RIGHT Y-AXIS

The right vertical axis represents:

• Cumulative Percentage (%)

This scale must end at:

• 100%

BARS

The bars represent:

• Frequency of occurrence

As per JUSE guideline:

• Bars must touch each other
• No gap should exist

Reason:
The categories are part of the same total population.

CUMULATIVE PERCENTAGE LINE

The cumulative line shows:

• Running percentage contribution

The line must:

• Start from first category
• End exactly at 100%

STEP-BY-STEP PREPARATION OF PARETO DIAGRAM AS PER JUSE

STEP 1 — DEFINE THE PROBLEM CLEARLY

A vague problem leads to poor analysis.

The problem statement should define:

• What is being analyzed
• Which department/process
• Time period
• Measurement criteria

Example:

• Customer complaints from April 2025
• Rejection defects in radiator assembly
• Breakdown analysis in brazing furnace

STEP 2 — COLLECT FACTUAL DATA

JUSE emphasizes:

“Go to Gemba and collect actual data.”

The data should be:

• Reliable
• Sufficient
• Traceable
• Objective

Data may include:

• Number of defects
• Downtime minutes
• Customer complaints
• Financial loss
• Accident frequency

STEP 3 — CLASSIFY THE DATA

Data should be grouped into meaningful categories.

Common classification methods:

• Defect-wise
• Machine-wise
• Supplier-wise
• Shift-wise
• Operator-wise
• Customer-wise

JUSE cautions that categories should:

• Not overlap
• Be easy to understand
• Represent actual conditions

STEP 4 — ARRANGE DATA IN DESCENDING ORDER

This is one of the most critical requirements.

The highest contributor must appear first.

Example:

Defect Type	Frequency
Fin Leakage	42
Brazing Issue	28
Dent	15
Core Blockage	7
Paint Issue	5
Others	3

The “Others” category must always remain:

• At the end

STEP 5 — CALCULATE CUMULATIVE FREQUENCY

The cumulative frequency is calculated progressively.

Example:

Defect	Frequency	Cumulative Frequency
Fin Leakage	42	42
Brazing Issue	28	70
Dent	15	85
Core Blockage	7	92

STEP 6 — CALCULATE CUMULATIVE PERCENTAGE

Formula:

\text{Cumulative Percentage} = \frac{\text{Cumulative Frequency}}{\text{Total Frequency}} \times 100

If total complaints are 100:

• 42 defects = 42%
• 70 defects = 70%
• 85 defects = 85%

The final cumulative percentage must always equal:

• 100%

STEP 7 — DRAW THE BARS

The bars represent:

• Frequency or quantity

JUSE graphical rules:

• Bars arranged highest to lowest
• Bars touching each other
• Uniform width
• Clear labeling

STEP 8 — DRAW THE CUMULATIVE LINE

The cumulative percentage line is plotted using:

• Right-side percentage scale

The line visually shows:

• Contribution accumulation

STEP 9 — IDENTIFY THE VITAL FEW

Generally:

• 70–80% contributors are treated as “Vital Few.”

Example:

• Fin Leakage + Brazing Issue = 70%

Therefore:

• Improvement priority must focus there first

JUSE GRAPHICAL GUIDELINES

BARS MUST TOUCH EACH OTHER

No gaps should exist between bars.

Reason:
The categories represent continuous components of total data.

DESCENDING ORDER IS MANDATORY

Random arrangement destroys Pareto logic.

CUMULATIVE LINE MUST END AT 100%

This indicates:

• Total population coverage

TITLE, PERIOD AND DATA SOURCE MUST BE SHOWN

A professional Pareto must mention:

• Data source
• Location
• Study period

INTERPRETATION OF PARETO DIAGRAM

The real power of Pareto lies in interpretation.

Management should ask:

• Which causes contribute most?
• What are the major losses?
• Which problems require immediate action?

The focus must always be:

• Vital Few first

This is the core philosophy of JUSE.

COMMON MISTAKES IN PARETO PREPARATION

USING INSUFFICIENT DATA

Small sample size leads to misleading conclusions.

MIXING DIFFERENT UNITS

Example:

• Combining frequency and cost together

This is incorrect.

POOR CLASSIFICATION

Overlapping categories reduce clarity.

NOT USING DESCENDING ORDER

Without descending order:

• Pareto loses meaning.

LEAVING GAPS BETWEEN BARS

This violates JUSE graphical standards.

APPLICATIONS OF PARETO DIAGRAM

Pareto analysis is widely used in:

• Manufacturing
• Supplier Quality
• TPM
• Six Sigma
• Customer complaints
• Safety analysis
• Warranty analysis
• Cost reduction
• Inventory management

PARETO DIAGRAM IN DEMING EXAMINATION

During Deming Prize assessment, examiners verify:

• Whether data is factual
• Whether prioritization is logical
• Whether corrective action is linked
• Whether improvements are measurable
• Whether Pareto supports management decisions

The chart must not be prepared merely for presentation purposes.

It should demonstrate:

• Actual problem-solving

PRACTICAL EXAMPLE FROM TATA TOYO RADIATOR

Suppose customer complaints are:

Complaint Type	Quantity
Fin Leakage	42
Brazing Issue	28
Dent	15
Core Blockage	7
Paint Issue	5
Others	3

Total complaints = 100

Pareto analysis shows:

• Fin Leakage + Brazing Issue = 70%

Therefore management should prioritize:

• Brazing process improvement
• Leak testing
• Handling systems
• Standard operating procedures

instead of distributing equal effort everywhere.

BENEFITS OF PARETO DIAGRAM

IMPROVES DECISION MAKING

Management can prioritize logically.

REDUCES RESOURCE WASTAGE

Efforts focus on high-impact areas.

IMPROVES VISUAL MANAGEMENT

Problems become easier to understand.

SUPPORTS CONTINUOUS IMPROVEMENT

Improvement becomes systematic and measurable.

ENHANCES MANAGEMENT EFFECTIVENESS

Teams focus on what matters most.

CONCLUSION

The Pareto Diagram is one of the most powerful tools in modern quality management. Under the guidance of Union of Japanese Scientists and Engineers, it has become an essential component of:

• TQM
• Kaizen
• QC Circle activities
• TPM
• Six Sigma
• Deming-based management systems

Its strength lies in simplicity, visualization, and prioritization.

JUSE philosophy teaches that:

“Not all problems are equally important.”

Organizations that correctly use Pareto analysis can:

• Improve faster
• Reduce waste
• Focus strategically
• Strengthen quality culture
• Achieve operational excellence

The Pareto Diagram ultimately supports the Japanese philosophy of:

“Management by Facts and Priorities.”