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The Practical Data Model for CMDB (PDMC) is a common information model for IT service management CMDB solutions, born from years of practical experience. The model is published under a Creative Commons license by Justin Group Oy. 

More information about the model available at www.justin.fi/pdmc 

This "PDMC Content Pack" is an add-on for the Data Content Manager (DCM) application. The content pack includes data model (blueprint) templates for CMDB. These templates can be used with DCM to document, populate and audit data based on the graphical data models. The PDMC is a vendor-agnostic model, but this content pack includes "translated" versions of the PDMC data models to match with ServiceNow CMDB tables and structures.

The content pack also includes domains and tier structures from the PDMC model for grouping the blueprints for management and reporting purposes.

Releasedv1.0 released: January 14th 2020

v1.1 expected release: March 2021

Installation and Setup

Download and install the content pack from the ServiceNow Store.

Blueprint templates

Blueprint templates included in different content pack version.

Blueprint templateDefault Data DomainDescriptionUpdated in version
PDMC - Business ProcessesBusiness Processes

Justin | The Practical Data Model for CMDB | v1.0 | L2 - Business Processes.

Considerations regarding this data model:
- Note that "Business Service" or "Service" class in ServiceNow has many use cases. Multiple logical classes in the PDMC are using the Business Service class.
- Are all the different "services" in scope: business services, service products, service packages, customer facing service and backend services.
- Role of the Business Process can vary based on requirements and overall data scope

1.0
PDMC - Business ServicesBusiness Services

Justin | The Practical Data Model for CMDB | v1.0 | L2 - Business Services.

Considerations regarding this data model:
- Note that the "Business Service" or "Service" class in ServiceNow has many use cases. Multiple logical classes in the PDMC are using the Business Service class.
- Are all the different "services" in scope: business services, service products, service packages, customer facing service and backend services.
- Role of the Business Process can vary based on requirements and overall data scope

1.0, 1.1
PDMC - Customer-Facing Services - Service OfferingsCustomer Facing Services

Justin | The Practical Data Model for CMDB | v1.0 | L2 - Customer Facing Services - Service Offering.

Considerations regarding this data model:
- Responsible persons and groups can be defined on different levels
- Business Service class has multiple usages in ServiceNow compared to different logical classes in the PDMC.
- Service Portfolio might have a hierarchy using Service Taxonomies.

1.0
PDMC - On-Premise Business Applications - Application
Servers
ServicesOn-Premise Business Applications

Justin | The Practical Data Model for CMDB | v1.0 | L2 - On-Premise Business Applications - Application Services.

Considerations regarding this data model:
- "Business Application" in the PDMC is mapped to "Application Service" in ServiceNow
- "Business Application" class in ServiceNow is for APM that is out-of-scope from the PDMC
- Change the "Service Configuration" related classes Application and Server to match your middleware, infrastructure and capacity plans.

1.0, 1.1
PDMC - SaaS Business Applications - Application ServicesSaaS Business Applications

Justin | The Practical Data Model for CMDB | v1.0 | L2 - SaaS Business Applications - Application Services.

Considerations regarding this data model:
- "Business Application" in the PDMC is mapped to "Application Service" in ServiceNow
- "Business Application" class in ServiceNow is for APM that is out-of-scope from the PDMC
- Change the "Infrastructure Service" class to match with your choice of CI classes to represent cloud platforms.

1.0, 1.1
PDMC - Databases - ClusteredDatabases

Justin | The Practical Data Model for CMDB | v1.0 | L2 - Databases - Clustered.

Considerations regarding this data model:
- In this model, DB instance is running on a cluster, another template for single server instances

1.0, 1.1
PDMC - Databases - On ServerDatabases

Justin | The Practical Data Model for CMDB | v1.0 | L2 - Databases - On Server.

Considerations regarding this data model:
- In this model, DB instance is running on a server, another template for instances running on a cluster.

1.0, 1.1
PDMC - End User Devices - Personal ComputersEnd User Devices

Justin | The Practical Data Model for CMDB | v1.0 | L2 - End User Devices - Personal Computers.

Considerations regarding this data model:
- Asset related classes, if Asset Management is in use
- Changing Desktop Software to Software Installation class if SAM plugin is in use.

1.0
PDMC - Server Capacity - Physical ServersServer Capacity

Justin | The Practical Data Model for CMDB | v1.0 | L2 - Server Capacity - Physical Servers.

Considerations regarding this data model:
- One could have separate blueprints for clustered and non-clustered servers.
- If server capacity is sold directly to a customer, then a Customer Facing Service Offering should be linked too.
- Physical servers should have a link to "location" one way or another (via Data Center, more detailed Rack or simply location reference)

1.0, 1.1
PDMC - Server Capacity - Virtual ServersServer Capacity

Justin | The Practical Data Model for CMDB | v1.0 | L2 - Server Capacity - Virtual Servers.

Considerations regarding this data model:
- One could have separate blueprints for clustered and non-clustered servers.
- If server capacity is sold directly to a customer, then a Customer Facing Service Offering should be linked too.
- Virtual servers should have a link to "virtualization cluster" or other virtualization CI that may be a virtualization technology-specific CI class. Just the "virtualization cluster" works for a more generic approach, especially if maintained manually.

1.0, 1.1
PDMC - Data CentersData Centers

Justin | The Practical Data Model for CMDB | v1.0 | L2 - Data Centers.

Considerations regarding this data model:
- Service Offering relationships can be on several levels
- Servers may be related to a Rack via an Enclosure

1.1