Decomposition pattern by business capability

How do you create and design microservices? If you are migrating existing systems, you might look at decomposing a monolith or application into microservices. Even for new a green-field project, you will want to think about the microservices that are required:

First, you identify the business capability, that is, what an organization does in order to generate value, rather than how. That is, you need to analyze purpose, structure, and business processes. Once you identify the business capabilities, you define a service for each capability or capability group. You then need to add more details to understand what the service does by defining the available methods or operations. Finally, you need to architect how the services will communicate.

The benefit of this approach is that it is relatively stable as it is linked to what your business offers. In addition, it is linked to processes and stature.

The drawbacks are that the data can span multiple services, it might not be optimum communication or shared code, and needs a centralized enterprise-language model.