What's the difference between quality assurance, quality control and quality center?

Quality Assurance = making good stuff and not making bad Quality COntrol = catching bad stuff before it gets shipped Quality Center = ? maybe where they do the testing ?

Quality Assurance = making good stuff and not making bad Quality COntrol = catching bad stuff before it gets shipped Quality Center = ? maybe where they do the testing ?

It's all rooted in statistics. With some things, testing for quality and reliability makes what you test unusable (chemical analysis on pharmaceuticals, burn-in on electronics, etc.). Instead of testing everything, the testing is sampled -- for electronics, all units are tested for functionality, but only a small sample of them are tested for durability by burn-in; for pharmaceuticals a small sample of them are tested for microbes, chemicals, etc.; for food, a small sample is tested for microbes and nutrition; and so on. You won't catch all the problems, guaranteed, but you can minimize what problems can go out the door. Quality control is done before it goes out the door. Everything is tested in a way that doesn't require ruining its usability for the customer, and a random sample is not sold but rather tested to make sure that problems aren't occurring across a lot of them such that it will be bad for the customers. Quality assurance is done post-sell. When people complain about a product, it is retested by quality assurance. Refunds are usually given anyway, but if quality assurance identifies an excursion (that is, a lot of bad stuff got out the door) then a recall could be issued. In any case, problems identified at QA are top priorities to identify where and why the excursion happened, whereas issues picked up by QC are not as high of priority to fix. The quality center is the place that this testing is done.