Explore the concept of multi-phase structure in software architecture through this 48-minute conference talk from ACM SIGPLAN's FUNARCH'23. Delve into how large-scale computations can be separated into distinct phases, even when the most natural specification may have a different structure. Examine a case study where data gathering, processing, and distribution form three execution phases, but are more conveniently specified by location. Learn about a novel applicative functor that expresses this multi-phase structure, and understand its implications from a software architecture perspective. Gain insights into potential applications in choreography and multi-tier architecture as presented by Jeremy Gibbons, Oisín Kidney, Tom Schrijvers, and Nicolas Wu.