No service exists in isolation: it always exists within a context or “ecosystem” of other services with which it interacts.
This occurs at every level, with every service, from an operations-layer web service or the services of a customer-service desk or an entire organization. It’s simplest, though, to describe this first at the whole-organization level.
To make sense of the relationships between services within the overall context, we need a clear distinction between “organization” and “enterprise.” Although ...
