This document outlines a concept called "Servicialisation" for reliable and payable service delivery. It introduces key terms like service identifying, specifying, composing, orchestrating, cataloguing, committing, concerting and billing. These terms are used to map the process of identifying a service, specifying it through attributes, composing it, orchestrating suppliers, cataloguing the service, committing to service levels, delivering the service and billing for it. An example of specifying an email service is provided to illustrate the 12 service attributes across 3 service levels. The service specification is positioned as the center of this process to reliably deliver services.