7 QC Tools, Quality Control and Assurance (SIX SIGMA, PDCA )

This course has been covered most of the topics which you should need to know as it is very important in term of decision-making and problem-solving but the main thing is that it solves the problem and allow you to decide on TOOLS ( 7QC tools such as process flow chart, control chart, histogram, check sheet, scatter diagram, Pareto chart, cause, and effect diagram ), so these are the 7 QC tool which tells about the reality of uncertainty and the unusual thing which occur during processes. They are used to examine the production process, identify the key issues, control fluctuations in product quality, and give solutions to avoid future defects.

In QA there are different tools such as PDCA (plan do check act) cycle, Six Sigma, Process Capability (Cp and Cpk) values, ISO, ASTM, and ASME standards, so these will tell about the concepts of optimization processes, these are the tools which facilitate the organization to resolve the basic problems and these quality management tools are still considered the gold standard for troubleshooting a variety of quality issues. They are frequently implemented in conjunction with today’s most widely used process improvement methodologies, including various phases of Six Sigma and continuous improvement processes.

Metrology is the science of measurement. Characteristics used to specify measurement instruments for experiments and process or quality control are defined. While there are numerous ways to make process measurements, specifying instrument performance is an important part of process development and planning. A way to make these specifications is illustrated with a simple statistical model that demonstrates the metrology rule of thumb that the instrument should be ten times better than what you want to measure.

Accuracy is the degree of conformity to a standard or true value.

For example, since the international standard for length measurement is the meter, if an instrument reads a meter, its accuracy would be in comparison to this international standard.

Precision defines the degree of refinement with which a measurement can be stated. This can usually be determined by inspecting the instrument and finding out the number of digits displayed or the “least count”.

For example, on a meter scale, the least count might be 10 mm, or for a digital micrometer the number of decimal places on the liquid crystal display indicates the precision, in Metrology, there are unique measuring instruments which are used for measuring the product accuracy and precision.

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