Robert Mounce, in his 1960 book The Essential Nature of New Testament Preaching, explains that the in outline form kerygma consisted of three parts-

1. A historical proclamation of the death, resurrection and exaltation of Jesus, seen as the fulfilment of prophecy and involving man’s responsibility.

2. A resulting theological evaluation of Jesus as both Lord and Christ.

3. An ethical summons to repent and receive forgiveness of sins.

This summary is derived from an analysis of Peter’s five speeches recorded at the beginning of Acts. It is also apparent in the semi-creedal elements that are found embedded in Paul’s epistles.

See Stott, The Preacher’s Portrait, p34.