subdomain-distillation

To classify subdomains for domain-driven design, you categorize business domains into Core, Supporting, or Generic types using heuristics like the Outsource Test and Wardley Evolution, aligning modeling investment with actual business value.

Core subdomains provide competitive differentiation requiring high modeling effort, Supporting subdomains are necessary but not differentiators, and Generic subdomains are universal needs often suitable for off-the-shelf solutions or outsourcing.

Sequence legacy modernization by prioritizing Core domains for high-rigor modeling and transformation, while identifying Generic subdomains as primary candidates for replacement using off-the-shelf solutions to optimize resource allocation.

Yes, you can apply domain-driven design distillation to security-sensitive domains by identifying critical slices within the architecture that require high-rigor modeling regardless of their general Core, Supporting, or Generic classification.

You should avoid heavy modeling investment in a supporting subdomain when it passes the Outsource Test or maps to a highly evolved Wardley Evolution stage, indicating it is a generic commodity better served by off-the-shelf solutions.