Quality assurance and testing are often confused. Quality assurance studies the manufacturing process and determines the defect in the production process, whereas testing is the process of inspecting the...

QA and QC are both concerned with the quality of products. ‘Quality Assurance’ is process orientated and focuses on defect prevention, whereas ‘Quality Control’ is product oriented and focuses on defect...

The term ‘upon’ is more formal than the term ‘on’. Although they both convey the same meaning, their difference is based on the context in which they are used.

‘Each’ and ‘Every’ are determiners terms that are used to express the quantity. The term ‘each’ is used to specify only one thing; whereas, term ‘every’ is used to specify all the constituents among the group.

Oral and written communications are both major forms of communication. Communicating by word of mouth is termed as oral communication. Written communication involves writing/drawing symbols in order to...