Decision as a Service (DaaS): A Service-Oriented Architecture Approach for Decisions in Processes

Separating decision modelling from the processes concern recently gained significant support in literature, as incorporating both concerns into a single model impairs scalability, maintainability, flexibility, and understandability of decisions. Most notably introduction Decision Model Notation (DMN) standard by Object Management Group provides suitable solution for externalising decisions automating enactments processes. This article introduces systematic way tackling separation process providing Service (DaaS) layered Service-Oriented Architecture (SOA) which approaches automated externalised services that need to invoke on demand obtain outcome. The DaaS mechanism is elucidated formalisation DMN constructs relevant layer elements. Furthermore, evaluated against fundamental characteristics SOA paradigm, proving its contribution terms abstraction, reusability, loose coupling, other pertinent principles. Additionally, benefits design process-decision mining are discussed. Finally, illustrated real-life event log bank loan application approval process, maturity assessed.