Decouple before dependencies slow you down.

Clarify responsibility and data ownership before the technical split

A service needs a clear business purpose. We examine processes, data ownership and change dependencies before components are extracted. If several services share the same tables and always have to be released together, the result is often just a distributed dependency without the intended benefit.

We distinguish synchronous queries from asynchronous process steps. For business processes spanning multiple services, intermediate states and compensation are explicitly modeled. A canceled reservation, for example, is a business action, not an arbitrary technical rollback across all databases.

Make distributed errors visible and actionable

Multiple services create additional network paths and possible partial failures. We plan timeouts, limits and retries so that a slow service does not block the entire application. Automatic retries require that an action is not unintentionally executed more than once.

The rollout starts in a clearly scoped area with measurable benefit. Common standards for logs, traces, deployment and on-call duty prevent every service from inventing its own operating rules. If the expected benefit does not justify the effort, a clearly structured modular application can remain the better solution.