"The fact must be expressed as data, but there is a problem in that the correct data is difficult to catch. So that I always say 'When you see the data, doubt it!' 'When you see the measurement instrument, doubt it!' [...]For example, if the methods such as sampling, measurement, testing and chemical analysis methods were incorrect, data. […] to measure true characteristics and in an unavoidable case, using statistical sensory test and express them as data." (Kaoru Ishikawa, Annual Quality Congress Transactions, 1981)
"As with many other things, there is a surprising amount of prejudice against quality control, but the proof of the pudding is still in the eating." (Kaoru Ishikawa, "Introduction to Quality Control", 1989)
"Quality control is applicable to any kind of enterprise. In fact, it must be applied in every enterprise." (Kaoru Ishikawa, "Introduction to Quality Control", 1989)
"90 percent of all problems can be solved by using the techniques of data stratification, histograms, and control charts. Among the causes of nonconformance, only one-fifth or less are attributable to the workers." (Kaoru Ishikawa, The Quality Management Journal Vol. 1, 1993)
"A standard which is not revised after six months of its establishment, indicates that it is not in use." (Kaoru Ishikawa)
"As long as your products or services are in the market, you should control their quality forever." (Kaoru Ishikawa)
"Basis of control is correct data and correct information. Eliminate false data." (Kaoru Ishikawa)
"Control charts do not exist for checking people. Rather, they are to be used for helping people to work successfully with ease." (Kaoru Ishikawa)
"Control determines predictability and reliability." (Kaoru Ishikawa)
"[Defining] organization is to clarify responsibilities and authority. Organization doesn’t simply involve setting up sections and groups. While authority should be delegated, responsibilities cannot be delegated." (Kaoru Ishikawa)
"Design a product by putting yourself in the shoes of its user." (Kaoru Ishikawa)
"Design without consideration of manufacturing method is not a design." (Kaoru Ishikawa)
"Eliminate causes rather than phenomena, and moreover, eliminate root causes to prevent recurrence." (Kaoru Ishikawa)
"Identify and work on topics which can help improving vertical communication and breaking sectionalism and barriers among different departments at an early stage." (Kaoru Ishikawa)
"Identify important problems, and make a focused attack on them together with others." (Kaoru Ishikawa)
"If an incident repeats for the same cause, then control is not being implemented." (Kaoru Ishikawa)
"If you do not conduct sufficient analysis and if you do not have firm technical knowledge, you cannot carry out improvement or standardization, nor can you perform good control or prepare control charts useful for effective control." (Kaoru Ishikawa)
"Importance of quality control increases with advancement in society and modernization in manufacturing." (Kaoru Ishikawa)
"In management, the first concern of the company is the happiness of people who are connected with it. If the people do not feel happy and cannot be made happy, that company does not deserve to exist." (Kaoru Ishikawa)
"It’s natural that progress of improvement activity in a large organization is not uniform. If you hear the report saying that all the groups are progressing at the same pace, suspect there is something wrong about the report." (Kaoru Ishikawa)
"Make sure to improve quality, and after that, move on to reduce cost. This will finally lead you to reduce the delivery time." (Kaoru Ishikawa)
"Management based on the theory that man by nature is evil is costly in the first place, and besides, it makes everyone unhappy [...]" (Kaoru Ishikawa)
"Management without goals or objectives is impossible." (Kaoru Ishikawa)
"No matter how good quality information you may have, it is meaningless, if it is not communicated in time. Devise a system for communicating information to relevant departments/sections, as quickly as possible." (Kaoru Ishikawa)
"Quality assurance essentially involves, 1) presenting a document (such as specification), demonstrating the producer’s commitment to production of a product complying with such document, and 2) then delivering the product which complies with the document. It does not mean, 1) producing a product first, 2) testing the product and find its actual characteristics, and then offering a document which describes the testing results/characteristics." (Kaoru Ishikawa)
"Quality control is part of work for every employee and every department/section. It will be successful if all employees and all departments/sections cooperate." (Kaoru Ishikawa)
"Quality control starts and ends with training." (Kaoru Ishikawa)
"Standardization can progress and management can be conducted only when management policy is defined." (Kaoru Ishikawa)
"Standardization enables delegation of authority, allowing the top management and executives to have time to think about future plans and policy, which is their most important duty." (Kaoru Ishikawa)
"Standardize technology so that you may accumulate technology organically in your company." (Kaoru Ishikawa)
"Standardization is not only for quality control. It involves establishing standards for managing the business well as well as for all employees to enjoy their work with comfort." (Kaoru Ishikawa)
"Standardization without needs or clear objectives tends to become ritual." (Kaoru Ishikawa)
"The fact that standards are not revised demonstrates that your technology has stopped progressing." (Kaoru Ishikawa)
"The ideas of control and improvements are often confused with one another. This is because quality control and quality improvement are inseparable." (Kaoru Ishikawa)
"The key is to standardize every technically definable area, and leave what cannot be standardized to the skills." (Kaoru Ishikawa)
"There are two types of badness: one is badness of a system itself, while the other is badness of not following established rules and system precisely. It is important to correct the badness of not complying with rules first." (Kaoru Ishikawa)
"Think how you can accumulate skills of individuals in your company, and build the structure which will allow you to hand them over to the next generation when you are promoted to higher position." (Kaoru Ishikawa)
"Think of at least four factors which influence your problem. See if a shift in one of these causes can give you a different effect to explore." (Kaoru Ishikawa)
"Top management is responsible for demonstrating methods for evaluating quality as well as standards." (Kaoru Ishikawa)
"Understand the reality of the problem first, rather than wondering what its cause may be. The first step of problem solving is to understand the existing conditions." (Kaoru Ishikawa)
"Unless you have good understanding of problems and objectives, you cannot solve them." (Kaoru Ishikawa)
"When problems and objectives become clear, your problems are half solved." (Kaoru Ishikawa)
"When you think you have no problems, you will stop progressing, or rather, you will slip backward." (Kaoru Ishikawa)
"When you try to control, a natural course of event would be improvement, and when you try to carry out improvement, a natural course of event would be good understanding of importance of control." (Kaoru Ishikawa)
"You cannot standardize or control effectively without intrinsic technology." (Kaoru Ishikawa)
"You collect data for using them and for acting on them. Stop taking data which do not lead to actions." (Kaoru Ishikawa)
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