'as-planned' originates from the English phrase 'as planned', where 'as' is a conjunction meaning 'in the manner or way that' and 'planned' is the past participle of 'plan', meaning 'to arrange a method or scheme beforehand'.

'as planned' was used in English to describe events or actions that occur according to a plan. Over time, it became hyphenated as 'as-planned' to function as an adjective.

Initially, it meant 'in the manner that was arranged', and this meaning has largely remained the same in modern usage.