The Human and Organization Architecture is one of three basic components of any enterprise (the other 2 are the Production Facilites, and the Control and Information Systems). In the PERA Model, it is usually depicted in the middle, since even more that the other two, it has interfaces with both the "Control and Information Systems" and the "Facilities".of the enterprise.
The organizational structure of the enterprise may be represented by a series of "Org Charts", beginning with very "high level" during the conceptual Engineering Phase, and continuing to a complete definition of all positions, responsibilites and work processes by facility startup.
PERA does not define any additional diagrams or documents to define the organizational and human aspects of the enterprise, since an adequate set of these has already been evolved for each industry. However, PERA does place these documents within an Architecture which relates them to the appropriate enterprise development phase, and to the other components of the enterprise.
The Organization is progressively developed during each phase of the enterprise. Note that the development of the organization to execute the project should not be confused with the development of the organization for the actual enterprise. The organization chart for the enterprise is progressively developed during each successive phase up to operations. The organization for the engineering, construction, etc., are complete and may be disbanded at the end of each phase.
There are modelling systems such as ARIS, which are designed to simulate both the Human and Organizational and Control and Information Systems components of the enterprise during a given enterprise phase (typically operations).
These models can be valuable in that they model both the Human actions and Informaton flows (at least for automated tasks). However, they do not represent the production facility itself, nor any of its control systems, so considerable manual interface work may still be required if the model is to correctly predict industrial enterprise behavior.
Also, they do not provide a mechanism for addressing maximum and minimun "extent of automation", but rather just document the selected degree of automation. Thus, when this level of automation is modified, the impact on the human and facilities elements of the enterprise are not immediately evident.
By contrast, the PERA Framework clearly demonstrates the relationship between level of automation ( of both the control and information systems and the faciltiy ), and its effect on the human and organizational element of the enterprise.