I had a debate with a friend about the definition of efficiency in AS Level Business (9609), and I want to know which understanding is more accurate for exams.
My friend says efficiency means “producing maximum output from minimum input,” which basically implies output increases while input decreases.
I argued that efficiency can also mean “producing more output with the same level of input” (i.e., output increases while input stays constant).
To me, these aren’t exactly the same. My friend’s definition suggests both increasing output and reducing input, while mine focuses only on increasing output with unchanged input.
I understand both relate to output per unit of input, but my question is:
Are these two definitions considered equally valid in exams, especially in application/analysis questions (3–5 marks)? Or is the “maximum output from minimum input” wording the only one that examiners accept?
Basically, can I safely use my version in answers, or do I need to stick to the textbook wording to avoid losing marks?