Why JMeter failures marks as KO?

Question

When I open JMeter dashboard I can see success in column OK and failure in KO column. According to urban dictionary KO is equals to OK

Answer 1

It’s mainly because contributors of this dashboard (french committers partly) thought KO meant not OK .

Feel free to contribute a fixing patch.

Answer 2

From JMeter 5.4 KO header renamed to FAIL

KO does not seem to be clear for some users: So name it FAIL instead

Answer 3

It's not only that French contributors thought: in several European languages (French and Italian included) KO actually used as not OK. For example "Je suis KO" means "I am not OK". You can see a discussion about this word here

From there, I think as early as 90s, or maybe even earlier, the word migrated into software, and I've seen it in several applications, since it's very convenient:

• To English speakers KO is short of knock-out in boxing, so can easily be connected something that is broken or busted out - like request result in this case is.

• Both words - OK and KO - are second short way to describe status (shortest way is V and X)

• They take the same space, and thus will not cause columns to misalign in any font (where's any different 2 letter words could, depending on font).

You also can change that: https://sqa.stackexchange.com/questions/28744/jmeter-dashboard-report-how-to-change-ko-to-failed-in-pie-chart-of-summary