What are the main differences between Quality Control and Quality Assurance, and what quality tools should be used to achieve a good quality ?

Quality Assurance is establishing right processes to ensure quality is built in to the product....It encompasses all the processes starting from Design and development, to, finishing and dispatch. Processes are made robust and continually improved so that, we have assurance that products being made will have right quality.

Quality Control is establishing test and measurement processes to ensure product is made as per the specifications, including product monitoring in the process.

 

Quality tools: Statistical tools are well tested and when used with right methodology, will deliver excellent results with minimal wastage of human labour. They can add lots of value to improve product quality. SPC techniques and Statistical sampling, etc

Other Basic7QC tools and also, New QC tools (also called New management tools) provide lots of opportunity in problem analysis and solution identification.

PFMEA, DOE, MSA add lots of value in establishing robust processes.

 

 

I agree with my friend Ahamed Shareef

Tools

·                            Cause and Effect / Ishikawa / Fishbone

·                            Control Chart 

·                            Histogram 

·                            Pareto Chart 

·                            Scatter Diagram Template 

Stratification Diagram

QA aims to prevent defects with a focus on the process used to make the product. It is a proactive quality process. and its goal is to improve development and test processes so that defects do not arise when the product is being developed by establish a good quality management system and the assessment of its adequacy. Periodic conformance audits of the operations of the system.

 

QC aims to identify and correct defects in the finished product. Quality control, therefore, is a reactive process. its goal is to identify defects after a product is developed and before it's released by finding & eliminating sources of quality problems through tools & equipment so that customer's requirements are continually met.

So we can understand that QA based on documentation system which is QMS and QC is a test based on laboratories test, owrkshops, ..... etc according to the field used.

Simply QA is process focused, while QC is results/targets focused.

Nice question dear, long time back i had same question in my mind.

will explain you in smiple language.

1. QA is purely into documentation ie "Do what you say and say what you do" this is what our iso says. This basily concentrate on coustomer satifaction, stackholders mainly as per iso9000 series
2. Now QC is one step ahead to QA, which consist of Preventive action. How Can we control our up coming problems or during our internal audit we find some loophole/problem in process/procedure,the whole management team sits together and take some decision this is the part of QC 
3.  QC tools are actully statistical Quality tools which needs data to take any decision,in above two process things were done hypothetically.now we have data to that gives proof to our hypothetics.

i alway say lean six sigma is the drawback of ISO. 

lean six sigma means removing the waste and make your process lean and work with3.6 PPM defects 

Briefly, QA occures during Execution Process inthe project,

While, Qc Occurs during Monitoring & control process , following the QA or with parallel overlapping.

I think the main important difference is the preventive actions in the Quality Assurance which is not in the Quality Control

Quality control means no compromise on quality of raw material or expertise induced in creating a product. It is related to manufacturing side. ----- Quality assurance means assurance given by manufacturer that product is of high standard as per specification & quality control measures taken this is related to marketing side of business, And to achieve good quality the input should be of high standard be it expertise , research , raw material,machinery or packaging and after sales services should be included ,which

quality control is for shopfloor & quality assurance for our customer or end user of the product.

qa is set of activities whose purpose is to demonstrate that an entity meets all quality requirements. this is done by adopting a standard set of process and ususl qa techniques like review, training, facilitation etc. it can be termed as defect prevention qc is set of activities whose purpose is to ensure that all quality requirements are being met.this is defect detection, and done by testing Quality Control is mainly an inspection function. Quality assurance is an audit function.QA is process oriented Activity while QC is product Oriented Activity.

 

And achieve a good quality information.

allows the company to reduce the legal risks associated with unmanned or inconsistently managed information and be more agile in response to a changing marketplace.