This document provides guidance for organizations on how to implement a service management system (SMS). Organizations can use this document to implement the entire SMS in order to conform to the requirements specified in ISO/IEC 20000-1, or parts of an SMS for a selected subset of requirements. This document illustrates a generic plan to manage implementation activities for an SMS. The intended users of this document are: a) organizations that require support on how to implement an SMS; b) consultants and advisors who support an organization during SMS implementation. This document can be used together with the other parts of ISO/IEC 20000 series.