Quality / Calidad


📌 Introduction to Quality: History, Concepts and Models

Why talk about quality?

The concept of quality has been widely debated and documented. Under this term, multiple definitions, certifications, standards and international organizations have been developed. This post aims to be a starting point to explore the topic, order key concepts and offer resources to delve into its different dimensions.

📘 What is quality?

A first approximation

We can understand quality as an innate quality, a characteristic recognized by all. But what does it really mean for a product to be of quality? What characteristics define it? How do we measure it?

From this initial perspective, quality is something abstract, without objective criteria that allow distinguishing between what is and what is not of quality.

📏 The need to measure quality

In order to manage it, it is necessary to measure it with objective and quantifiable criteria. For example, a piece of jewelry will be of higher quality if it contains more gold. Differences in quality translate into differences in the quantity or intensity of a desired feature.

👥 The customer has something to say

A car reaches 180 km/h and consumes 4 litres/100 km. Another reaches 230 km/h but consumes 8 litres/100 km. Which car is of higher quality, the one that runs the most or the one that consumes the least?, both are quantifiable measurements.

 

It depends on the client. For those who value saving, the former will be better. For those looking for speed, the second. Therefore, quality also depends on the user's perception.

"Quality is fitness for use" – J.M. Juran

🎯 Specification Compliance

Quality is the degree of compliance with the specifications defined by the customer. These specifications include tolerances, costs, prices, and other measurable factors.

🧭 Historical evolution of the concept of Quality

 

From the previous section, the need arises to set objective criteria so that when talking about quality, everyone talks about the same thing. That is, international standards and related activities, to facilitate the exchange of service goods around the world. From this need arose ISO "International Organization for Standard", or International Organization for Standardization, where ISO quality standards are defined. ISO "International Organization for Standardization" was founded in 1947, and is headquartered in Geneva, Switzerland. It was promoted by the United Nations, after the Second World War. In 1987, the ISO 9000 series was created, which has been gradually revised until today. Its high level of implementation in European companies has forced American companies to adopt the standard. In Europe, EFQM "European Foundation for Quality Management" was founded in 1988, with the support of the "European Union", the "European Organization for Quality". It is currently made up of 600 organizations, including private and public companies, universities and institutes.

  • In 1991, the "EFQM Excellence Model" was developed
  • Since 1991, it has awarded the "European Quality Award", using the previous model as an evaluation criterion.

Meanwhile in the United States, in 1986, the SEI "Software Engineering Institute" developed the "Maturity Model", with the help of theMITRE corporation, to help organizations improve their software processes. Initially, it was intended to provide the U.S. Federal Government with a method with which to evaluate software vendors. In 1991, the CMMI "Capability Maturity Model Integration" was created to help organizations develop effective processes. We will then analyse each of the organisations and the models developed by them separately. But first we consider it interesting to see the evolution and trends regarding quality, from its beginnings to the present time:

  1. At the beginning of the century, the need for the complete Workplace was seen.
  2. Around the 1920s, full-time quality inspectors  were introduced.Frederic Winslow Taylor's Studies  on this subject are of vital importance.
  3. With the arrival of the Second World War, and the consequent increase in production (especially in the arms industry), at the beginning of the 40s it was necessary to replace full-time inspectors with the Statistical Control of the Process. The major proponent of this term was W. Edwards Deming, with his 14 points for management and the PDCA cycle, and Joseph M. Juran, with the Pareto chart, and Juran's trilogy. Other authors who contributed to the development of Statistical Control were Walter Ashewhart, Harry Roming, and H. arold Dodge
  4. At the end of the 60s, another leap was made, Quality was no longer considered, as a part of Quality reintegrated into the functions
  5. Total Quality Management

🧠 Key Thinkers

 

Frederick W. Taylor March 20, 1856 – March 21, 1915

 

He was born in Philadelphia, United States, and his most important contribution to the field of Quality is the application of the scientific method to the organization of work. It meant a qualitative and quantitative leap in the field of Quality, and in industry its theories on the specialization of the job. In the following link, we can read the summary of his most important ideas:

http://www.monografias.com/trabajos26/taylor


His most outstanding books were:

  • "Piece Rating System" 1895
  • "Shop Management" 1905, which has been attached at the bottom of this page.
  • "The Principles of Scintific Management" 1911Joseph M. Juran

Born in Braina, Romania, he has lived in the United States since he was a child, his ideas had a great impact in Japan.

 

JOSEPH M. JURAN: 1904 - 2008

 

In 1979, he founded  the Juran Institute, whose objective is to provide organizations with techniques and tools for quality control.

His two major contributions in the field of Quality are:

  • Pareto chart: it is a graph to organize data so that they are in descending order, from left to right and separated by bars. It is based on the Pareto Rule which says that 20-30% of cases are responsible for 70-80% of failures. Therefore, by concentrating on eliminating these main causes (on the left of the graph), we will eliminate most of the failures.
  • Juran Trilogy: is based on three fundamental processes for quality control.
    • Quality Planning
    • Quality Control
    • Quality Improvement

W. Edwards Deming 1904 - 2008

Originally from the Sioux city in the United States, from the fifties he went to Japan, where his ideas were very well received, from such an point that there the quality awards were called "Deming Awards". Her studies are aimed at the statistical control of processes and the improvement of Quality.

Its most important contributions are

· 14 POINTS FOR MANAGEMENT

Which we will briefly summarize (the text in italics is taken from the book written by him "Quality, productivity and competitiveness: the way out of the crisis")

1.- Constancy purpose of improvement

"To create consistency in the purpose of improving the product and service, with the aim of becoming competitive and staying in business, and of providing jobs."

2.- Adopt the new philosophy.

"We are in a new economic era. Western managers must be aware of the challenge, they must learn their responsibilities, and take over leadership to change. “

3.- Eliminate mass inspection

"Stop relying on inspection to achieve quality. Eliminate the need for mass inspection, incorporating quality into the product first."

4.- Relationship with suppliers

"End the practice of doing business on the basis of price. Instead, minimize the total cost. Tend to have a single supplier for any item, with a long-term relationship of loyalty and trust."

5.- Continuous Improvement

"Constantly and always improve the production and service system, to improve quality and productivity, and thus reduce costs continuously."

6.- Training

"Implement training on the job."

7.- Implement leadership.

"The goal of monitoring should be to help people and machines and appliances do a better job. The supervisory function of management needs to be reviewed, as well as the supervision of operators."

8.- Remove fear

"To discard fear, so that everyone can work effectively for the company."

9.- Inter-departmental teamwork

"Break down barriers between departments. People in research, design, sales, and production must work as a team, to anticipate production and in-use problems that might arise with the product or service. “

10.- Quality depends on the system

"Eliminate slogans, exhortations and goals to ask the workforce for zero defects and new levels of productivity. Such exhortations only create adverse relationships, since the bulk of the causes of low quality and low productivity belong to the system and therefore fall beyond the possibilities of labor."

11.- Leadership vs. Objectives

a) Eliminate work standards (quotas) in the plant. Replace with leadership.

b) Eliminate management by objectives. Eliminate management by numbers, by numerical objectives. Replace with leadership. “

12.- Identification of workers with the company

"a) Eliminate the barriers that deprive the worker of his right to be proud of his work. The responsibility of superiors must shift from mere numbers to quality.

b) To remove the barriers that deprive management and engineering personnel of their right to be proud of their work. This means, among others, the abolition of annual or merit-based qualifications and management by objectives."

13- Training

"Implement a vigorous program of education and self-improvement."

14.- It involves the entire company

"Put all the company's personnel to work to achieve the transformation. Transformation is everyone's task."

Diagram

AI-generated content may be incorrect.

 

 

 

Philip B. Crosby

"Zero defects" and cost of non-quality

Philip B. Crosby (1926–2001) was one of the great references of quality management in the business world. Their focus was on error prevention and the idea that quality doesn't have to be expensive, quite the opposite.

🔹 Key principle: "Quality is free"

In his most influential book, Quality is Free (1979), Crosby argues that investing in quality early on reduces costs in the long run, as errors, rework, returns, and customer churn are avoided. This idea is summed up in his famous phrase:

"Quality doesn't cost. What costs is the lack of quality."

🔹 The concept of "Zero defects"

Crosby popularized the "Zero Flaws" approach, which doesn't mean absolute perfection, but an organizational commitment to getting things right the first time. For him, mistakes are not inevitable, but the result of poorly designed processes or a culture that is permissive of mediocrity.

🔹 Its four absolute principles of quality

  1. Quality means conformity to requirements.
  2. The quality system is prevention.
  3. The performance standard is zero defects.
  4. The measure of quality is the price of non-compliance.

🔹 Cost of non-quality

Crosby introduced the concept of Cost of Poor Quality (COPQ), which includes:

  • Costs of internal failures (rework, waste)
  • Costs of external failures (warranties, returns, loss of reputation)
  • Evaluation and inspection costs

His approach helped many companies quantify the economic impact of not managing quality well, and justify investments in training, process improvement, and organizational culture.

 

🏛️ International models and standards

ISO – International Organization for Standardization

The objective of this organization is to define methods, so that organizations can objectively evaluate their suppliers. Thus, in 1987, he created the quality standards of the serious ISO 9000
 for this purpose.Every five years they are reviewed, and updated, the first revision was in 2000, and the second in 2005.In this section we will analyze the ISO Standards.

The Rules:

  • ISO 9000 Standard: includes the fundamentals, definitions and terms of Quality Management Systems.
  • ISO 9001 Standard: sets out the requirements that must be met by any organisation that wishes to benefit from the standard. The ultimate goal should be to achieve customer satisfaction.
  • ISO 9004 Standard: focuses on the effectiveness and efficiency of the Quality Management System. The objective of the standard is aimed at improving performance.
  • ISO 19011 standard: aimed at audits and environmental management.

The 8 Principles for Performance Improvement:

These principles are the ones on which management should be based, to direct the organization, in Quality.

  1. Customer Focus
  2. Leadership
  3. Staff Engagement
  4. Process-based approach
  5. System Approach to Management
  6. Continuous Improvement
  7. Fact-based approach to decision-making
  8. Mutually beneficial supplier relationships



Process-Based Approach and Continuous Improvement:

🔄 Principles of Quality Management (ISO 9000:2005)

1. Customer focus

2. Leadership

3. Staff Engagement

4. Process-based approach

5. Systems-based management

6. Continuous improvement

7. Fact-based decision-making

8. Mutually beneficial relationships with suppliers

 

EFQM – European Foundation for Quality Management

In this section, rather than the "European Quality Award", we will focus mainly on the "EFQM Model of Excellence"

Below, we present graphically the basis of the model.

EFQM MODEL

Diagram

AI-generated content may be incorrect.

 

www.efqm.org

CMMI – Capability Maturity Model Integration

Process Maturity Model Developed by SEI

The CMMI (Capability Maturity Model Integration) is a process improvement model originally developed by the Software Engineering Institute (SEI) at Carnegie Mellon University. It is designed to help organizations improve their processes and their ability to develop high-quality products and services.

CMMI provides a structured framework for assessing the maturity of an organization's processes and guiding its continuous improvement. It is applied in areas such as software development, systems engineering, procurement, services, and more.


The model defines five levels of maturity, which represent the degree of sophistication and optimization of an organization's processes:

  1. Initial (Level 1)
    • Unpredictable, poorly controlled and reactive processes.
    • Success depends on individual people, not set processes.
  2. Managed (Level 2)
    • Processes planned, documented, and executed according to policies.
    • Projects are managed and requirements are controlled.
  3. Defined (Level 3)
    • Standardized and documented processes throughout the organization.
    • They adapt to specific projects from a standard set.
  4. Quantitatively Managed (Level 4)
    • Metrics are used to control processes and products.
    • Variations are managed and results are predicted.
  5. Optimization (Level 5)
    • Continuous improvement based on innovation and quantitative analysis.
    • Root causes of problems are identified and corrected.

Model Components

  • Process Areas: Sets of related practices that contribute to achieving improvement objectives.
  • Specific and generic practices: Activities that must be implemented to meet the objectives of the model.
  • Representations:
    • Staged: Assesses the overall maturity of the organization.
    • Continuous: Assesses the capability of each process area individually.

Benefits of CMMI

  • Improves product and process quality.
  • Reduce risks and costs.
  • Increases customer satisfaction.
  • Improve project predictability.

 

🌐 Links of interest

Access to the official website of ISO International Organization for Standardization, where all standards are defined, as well as additional information on Quality

http://www.iso.org


Spanish Association for Quality

http://www.aec.es


Spanish Association for Standardization

http://www.aenor.es

 

Institute that bears his name, in which you can access his biography, the activities of the institute, etc,,

http://www.deming.org/

Website of the JUSE "Japan Union of Scientists and Engineers"

http://www.juse.or.jp/e/deming/

American Society for Quality

http://www.asq.org


European Foundation for Quality Management:

http://www.efqm.org


Juran Institute

http://www.juran.com

📚 Recommended Books on Quality

The Principles of Scientific Management – F.W. TaylorIntroduces the scientific organization of work and operational efficiency.

Quality Control Handbook – J.M. Juran
Technical Manual on Quality Control and the Juran Trilogy.

Managerial Breakthrough – J.M. JuranFocused on continuous improvement and chronic problem solving.

Quality, Productivity and Competitive Position – W.E. DemingPresents the 14 management principles and the PDCA cycle.

The Deming Method in Practice – W.E. DemingPractical Application of Deming's Principles.

Quality is Free – P.B. CrosbyIntroduces the concept of "Zero Defects" and the cost of non-quality.

Introduction to Quality Control – Kaoru IshikawaJapanese view of quality control and teamwork.

Understanding ISO 9001 – Carlos H. HernándezPractical guide to implementing ISO 9001:2015.

Guide to the preparation of a quality manual – Adriana Gómez VilloldoManual for writing quality documentation.

The 5 S's: Practical Guide – Héctor SantiagoImplementation of the 5S methodology for order and efficiency.

Process Management – Various AuthorsHow to structure organizations around key processes.

Keys to Lean Management – Various authorsIntroduction to Lean thinking and waste elimination.

🚀 Latest trends in quality management (2025)

1. Quality 4.0 and Artificial IntelligencePredictive analysis, decision automation, real-time control.

2. Internet of Things (IoT)Connected sensors for traceability and continuous control.

3. Digitalization and automationERP, dashboards, online document control.

4. Sustainability and ESGI approachIntegration of environmental and social standards (ISO 14001, SDGs).

5. Extended risk managementStandards such as ISO 22301 and 45001 for organizational resilience.

6. Ethical leadership and organizational cultureReal commitment to continuous improvement, ethics and transparency.