The programme that most consistently produces immediate organisational action. The executive team effectiveness diagnostic — completed before the programme by each participant's direct reports and peers — delivers feedback of an honesty and specificity unavailable in any other format. The culture design workshop on day two, in which participants draft a genuine culture change intervention for their organisation with faculty support, is the programme most frequently described by participants as having changed the direction of their organisation. A bespoke team version — in which the whole C-suite attends together — is the most powerful organisational intervention in the portfolio.