I am only adding to what David, Dale, and Urmas have noted.
Ensure you understand the clear purpose of what the Resource OBS will be used for, e.g;
- An additional Resource Pool structure. Remember there will already be at a minimum 4 resource pools that every resource will be a part of :- Resource Manager, Role, Department, and Location. If none of the 4 base resource pool structures listed accurately describe how you will manage your pool of resources, then introduce a new and complementary structure.
- Will it be used in team plans, particularly when requesting a role to be filled. I can use the Staff OBS to identify a role from the specific Resource OBS.
- Will it be to reflect which parts of the business demand comes and therefore the resources are reserved for (though there may not be investments raised in the demand).
- Do I anticipate allocating a group of resources by OBS to a specific investment (Add/Update by OBS)
Then once that purpose is clear adopt some of the following principles:
- Your Resource OBS does not need to perfectly reflect an organisation reporting structure, it needs to reflect a hierarchical model.
- Ensure that the model is extensible for other units that may look to leverage this capability (this is talking to your Level 1 and 2 of your hierarchy and building this into your structure design up front).
- Make sure it makes sense when you roll up at all the levels. pdesur your structure has executive off to the right and super to everything, but is the executive not just another team alongside "Planning and Transformation", "Finance" etc. at that level. This is evident if you filter on the "Executive" level of the OBS and all nodes below would you get hundreds of resources or just your "Executive" team (the same could be said for the "Portfolio Management Office" in your example).
- Don't double up on information captured in other fields e.g. Project Manager should be a role, but you don't necessarily need to repeat this into the OBS. It is even more evident with the SMEs, which I am assuming come from your lines of business where they just need to be defined in their primary role as an SME and not necessarily a node on the OBS. Dale_Stockman noted this as well. A second example of this is
- Design the structure in anticipation of restructures, because what you want to be able to do is move whole nodes under a new parent in the future to assist in bulk updates. e.g. "Risk" may be moved in the future under the "Planning and Transformation" node as a child.
In a revised structure to your to what you mapped in the image I would initially be starting to look at the following: