What is meant by quality assurance and fall which process group?

thanks for invition ,,,,,,,,,, i agree with experts answers

he quality assurance ensure that all processes are working in compliance with the standards and rules defined for customer satisfaction or organization requirements.

It is in executing process group according to PMbok 5,

I will answer your questions first part, whereas i am not clear with second part.

Quality Assurance is the process in which the product performance is achieved by proper planning, executing, monitoring and control of all parameters in manufacturing process.