Not the architecture. Not the infrastructure stack. Not the difference between IaaS, PaaS, and SaaS, unless those distinctions become relevant to a specific decision you are being asked to make. What a non-technical leader actually needs to understand about cloud migration is where the human system breaks down, because that is where the programme will fail if it fails. The technology in a cloud migration almost always works. The organisational dynamics around it frequently do not, and those...