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Service System Transition
Service System Transition
Level - 3
Category: Service Establishment and Delivery
The purpose of Service System Transition (SST) is to deploy new or significantly changed service system components while managing their effect on ongoing service delivery.
The purpose of Service System Transition (SST) is to deploy new or significantly changed service system components while managing their effect on ongoing service delivery.
SG 1 Prepare for Service System Transition
SP 1.1 Analyze Service System Transition Needs
SP 1.2 Develop Service System Transition Plans
SP 1.3 Prepare Stakeholders for Changes
SG 2 Deploy the Service System
SP 2.1 Deploy Service System Components
SP 2.2 Assess and Control the Impacts of the Transition
SG 1 Prepare for Service System Transition
SG 1 Prepare for Service System Transition
Preparation for service system transition is conducted.
Preparation for service system transition is conducted.
SP 1.1 Analyze Service System Transition Needs
SP 1.1 Analyze Service System Transition Needs
Analyze the functionality, quality attributes, and compatibility of the current and future service systems to minimize impact on service delivery.
Analyze the functionality, quality attributes, and compatibility of the current and future service systems to minimize impact on service delivery.
Example Work Products
Example Work Products
Compatibility analysis of current and post-transition service systems
Issues to be addressed and risks to be mitigated associated with the transition
Subpractices
Subpractices
Establish a baseline of the current service system, if it has not been done previously.
Analyze the current service system as it operates within the current delivery environment.
Analyze the service system components that are proposed for transition (e.g., the post-transition or to-be service system) for potential compatibility, functionality, quality attribute, or interface issues.
Identify and mitigate potential issues.
SP 1.2 Develop Service System Transition Plans
SP 1.2 Develop Service System Transition Plans
Establish and maintain plans for specific transitions of the service system.
Establish and maintain plans for specific transitions of the service system.
Example Work Products
Example Work Products
Plans for service system transition
Subpractices
Subpractices
Define the deployment approach for each specific service system transitions.
Determine the cost, resources, and schedule required for transition of the service system to a new or changed operational state.
Identify relevant stakeholders for transition activities.
Develop a service system transition plan.
Obtain stakeholder commitment to the plan.
Establish a baseline of the transition plan.
If new or significantly changed essential functions are part of a transition, ensure that the service continuity plan is refreshed to include the new essential functions.
SP 1.3 Prepare Stakeholders for Changes
SP 1.3 Prepare Stakeholders for Changes
Prepare relevant stakeholders for changes in services and service systems.
Prepare relevant stakeholders for changes in services and service systems.
Example Work Products
Example Work Products
Transition notification strategy
Transition training strategy
Subpractices
Subpractices
Establish and maintain a transition notification strategy.
Implement the notification strategy to keep relevant stakeholders informed about scheduled changes in services and service availability during the transition.
Establish and maintain a transition training strategy.
Implement the training strategy.
SG 2 Deploy the Service System
SG 2 Deploy the Service System
The service system is deployed to the delivery environment.
The service system is deployed to the delivery environment.
SP 2.1 Deploy Service System Components
SP 2.1 Deploy Service System Components
Systematically deploy service system components into the delivery environment based on transition planning.
Systematically deploy service system components into the delivery environment based on transition planning.
Example Work Products
Example Work Products
Installation records
Deployment evaluation artifacts
Subpractices
Subpractices
Confirm that service system components to be deployed are placed under configuration control as appropriate.
Install the service system into the delivery environment.
Validate service system components in the delivery environment.
In the case of service system component retirement, archive the service system components appropriately and remove them from the delivery environment.
SP 2.2 Assess and Control the Impacts of the Transition
SP 2.2 Assess and Control the Impacts of the Transition
Assess the impacts of the transition on stakeholders and service delivery, and take appropriate corrective action.
Assess the impacts of the transition on stakeholders and service delivery, and take appropriate corrective action.
Example Work Products
Example Work Products
Post deployment review
Deployment assessment artifacts
Subpractices
Subpractices
Use data gathering methods to obtain input from relevant stakeholders about the deployment.
Proactively communicate information about deployment impacts.
For significant impacts, refer to the tactical plan for details about how and when deployment backout or rollback should be performed.
Continue to assess and control impacts until deployment issues are resolved.
Conduct a post-deployment review.
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