Yeah, a group of emus being a mob kind of makes sense. But, it turns out, what you call a group of giraffes depends on whether they are running or standing. A group of baboons is a congress. Hey that makes sense too. Cheetahs are a coalition. Cats get together as a clowder or a clutter. Mice are a mischief. Eagles hanging out together are called a convocation. Penguins are a rookery. Hamsters are a hoard. Kangaroos congregate in a troop. Seems like a group of wombats are called a mob too.
Quality assurance (QA) is a way of preventing mistakes or defects in manufactured products and avoiding problems when delivering solutions or services to customers; which ISO 9000 defines as part of quality management focused on providing confidence that quality requirements will be fulfilled.
Quality control (QC) is a procedure or set of procedures intended to ensure that a manufactured product or performed service adheres to a defined set of quality criteria or meets the requirements of the client or customer. QC is similar to, but not identical with, quality assurance (QA). QA is defined as a procedure or set of procedures intended to ensure that a product or service under development (before work is complete, as opposed to afterwards) meets specified requirements.