The methods that make up WWPMM are organized into thirteen subject areas called project management (PM) domains. Each of the domains contains two or more sub-domains. Likewise, each sub-domain contains two or more processes.
The sub-domains address a more detailed topic within the general area covered by the domain. For example, the domain that addresses the management of the work plans includes a sub-domain that is concerned with both the Project management schedule and the Operational schedule.
The processes contain a series of steps that describe how a specific project management activity is carried out. Continuing the above example, the sub-domain that is concerned with the Project management schedule and the Operational schedule includes a process that describes how the Operational schedule is created.