Quality Control and its Seven Tools

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Published: 20th November 2016
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The concept of quality control management is applicable to all businesses regardless of their sizes and the products or services being offered. The term quality takes different forms for different industries. It intends to take different meaning depending on the products, services or a combination of both being offered by the company in question.

The basic concept of quality management is to guide any business towards improved performance for their organizational benefits on the whole. Quality assurance, quality control and quality improvement are the three main components of quality control management. This article discusses on the second component of quality control and its tools in detail.

Quality control is defined to be a procedure or set of procedures formulated by the organization to ensure that the manufactured product or performed service being offered adheres to their per-defined set of quality standards to meet the requirements of their clients with the best possible satisfaction.

For the effective implementation of a quality control program, organizations need to do the following step by processes.

Determination and decision of the predefined specific quality standards of their products or services.
Collection of real time data as to their failures in performance by due comparison. ( per cent of units that fails to meet the estimated standards)
Taking corrective action i.e., repairing the defective unit or repeating the service at their own cost in case of poor service.
Revising the production or service plan in case of too much of failures to improve the production or service processes in Web Development Services.
Continuing the quality control process to ensure that the remedial measures have produced satisfactory results.

Given below are the seven tools of quality control.

Process flow chart: A flow chart is a combination of simple symbols and arrows to describe the sequence and relationship of different tasks of an activity in representation of its operations and decisions. It aids in better understanding of the processes.

Check list: Check list is a simple but powerful tool that helps in task management. It helps a great way to plan the projects such as prioritizing the ‘To Do' items, making note of the responsibilities and recording the accomplishments with Outsourcing Software India.

Cause-effect Diagram: It is also called as Fish-bone, Feather or root-cause diagram because of the arrangement of its diagram. It is a diagrammatic representation that demonstrates all the causes that influences an effect. This diagram is a systematic collection of ideas of a group that facilitates analyzing and understanding the ultimate diagnosis of a problem.

Pareto Analysis: Pareto charts are combination of bar diagrams and a distribution chart that are used to identify and prioritize the problems to be solved. These are aided by the 80/20 rule of Joseph Juran which states that 80% of the problems are approximately created by 20% of the causes.

Histograms: Histograms are combination of bar diagrams that are usually used to represent frequency data. They provide an easy way to evaluate the distribution of data over different categories.

Scatter diagram: Scatter diagram is a statistical tool that shows a trend in a series of values. It is helps to compare two sets of related quantitative data by displaying the elements in appropriate places of x and y co-ordinates. It is used to investigate the possible relationship between the two variables with the ‘line of best fit' using the method of least squares.

Control charts: Control chart which is similar to that of run chart that helps to check into the status of control of the processes by defining its upper and lower limits. It helps to detect the possibility of the process to go out of control with the help of proper samples.

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