It may be thought of, in a sense, as the effect of the illocutionary act via the locutionary act.
2.
It is also often emphasised that Austin introduced the illocutionary act by means of a contrast with other kinds of acts or aspects of acting : the illocutionary act, he says, is an act performed " in " saying something, as contrasted with a locutionary act, the act " of " saying something, and also contrasted with a perlocutionary act, an act performed " by " saying something.