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Quality Assurance: QA is part of the quality management system focussed on providing confidence that quality requirements will be fulfilled and is aimed at the predicting and preventing the error before it's occurrence and covers the overall package. It’s a set of activities designed to ensure that the development and/or maintenance process will meet its objectives and it ensures that the right or step is followed by the right people.It can be carried at the point of production, completion or inspection by client and It’s used to identify and control the defects in products or process both present and in the future. Quality assurance defines the quality policy and in turn, how to follow the policies in better way to avoid any issues/defects thus saving time effort and money in the production of product but also providing the customer with exactly what they require. A Quality Assurance Engineer takes the preventive actions to eliminate the defects in the product and may well be involved in developing and provision of packaging & shipping requirement s to ensure the finished products arrive in good order. Quality Control: The dictionary would define this as a process for meeting the established goals by evaluating and comparing actual performance and planned performance, and taking action on the difference. It’s aimed at a process, looking at it’s inspection criteria, rejection criteria & acceptance criteria and taking the required steps to improve the passing quantity. Quality Assurance will come into play on end products and has to be assured before the end product leaves the site en route to the costumer. Conformity to customer specifications will be strongly measured and documented, parametric and life tests will be carried out on selected samples, if necessary the end product will be sent for re-work or scrap yard. Quality control and Quality Assurance are both necessary in a manufacturing firm to ensure strict conformity to requirements
I think, the first part of your explanation on QA is OK. But the last part says, QA comes in to play on end products...which is not right!!
Quality Assurance is establishing a system throughout the organization such that, product quality is ensured through out the value stream...You can provide different methodologies - RM control, Defining process parameters, ensuring that process parameters are being met, online monitoring, end product assurance, etc. By doing all these activities, we assure every stakeholder including company management, that, product meets the intended requirements.
Hope you agree with me.....
QA:Quality Assurance makes sure that you are doing the right things in the right way that is the reason it is always comes under the category of verification activity.
QC: Quality Control makes sure that whatever we have done is as per the requirement means it is as per what we have expected, that is the reason it is comes under the category of validation activity
QA. has to do with the pre- determined regulated measures and procedures to be applied on your production process , while QC has to do with the application of those measures while doing your job َ
Quality Assurance defines the processes how to do a work to achieve the desired result (Quality) like Method Statements, ITP, Drawings and Specification.
Quality Control is to check and ensure that Product or Installation is as per approved Method Statement, Drawings and specifications.
Quality Control is product oriented, while Quality Assurance is process oriented.
QA is a set of activities for ensuring quality of the process and it is a proactive quality process.
QC is a set of activities for ensuring quality in products and this is a reactive process. It use to identify defects after a product is developed and before it's released.
I think Quality control is a part of product or a service process of production so that the output meets consumer satisfaction, here lots of process and procedures are monitored strictly may it be KAIZE, Chaku Ckaku, POKA-YOKE ect.
Quality Assurance is a confidence that the a manufacturer or a service provider gives either to the end user or consumer that the product or the service meets expectations and performs as per design.
Quality Control: is a process of controlling quality of the product delivered while in execution with the help of control tools like checklists,records,formats,ITP;S
Whereas Quality Assurance is the creation of system for assuring the product quality before executing it which gives confidence to the clients about the process being used to deliver the product to achieve the freezed specifications....
Quality Assurance is a proactive approch, while Quality Control is a reactive approch.
"Quality Assurance is process oriented and focuses on defect prevention, while quality control is product oriented and focuses on defect identification."
http://www.diffen.com/difference/Quality_Assurance_vs_Quality_Control
So how does this relate for example, in the area of Software Test Methodology? A brief answer; both of the processes have relevancy in the area of Software Test Methodology. More emphasis is usually placed in the area of Quality Assurance processes. Software products being highly complex in nature, require through processes that verify that customer requirements are valid and a record of such validation is kept to insure that a software product is of quality.
the major difference between the QA and QC is that by QA provide the sets of standards during the process, by which prevent the product by any defects. whereas QC defines the set of to identify the defects in the product.
