Act 2, scene 9: The deep layers today

Scene 9: The deep layers today

Below the domain primitives are the data model, the database and the infrastructure. Every customer stands on them. Where a customer needs data the model did not include, platforms offer custom fields, stored as metadata so that the shared schema itself does not change. In our experience, these often hold information at the edge of the domain rather than at its core. Risk grows with depth. A change here cannot easily be seen, compared with what came before, or reversed. Because the revenue depends on these layers, they change last, if at all.