Most change programmes lose their value in the gap between a launch date and the lived reality that follows. A design ships, but the operating model arrives in the organisation across months. Teams revert to old patterns, decision rights informally re-route to who they used to belong to, new cadences fade into old ones. The design is the early step. Adoption is most of the work.
The first ninety days set the trajectory. What gets reinforced, what's allowed to slip, what gets explicitly addressed when it surfaces. Among employees who've been through a workplace transformation, only about one in five rates the experience as good. The rhythm established in the early months determines whether the new design becomes how the organisation actually works, or stays a parallel layer above it.