I have a similar
situation here and might be useful in a portfolio of projects. Our engineering team is involved in
multiple projects. And our engineering managers strongly oppose the allocation of resource
names to activities which will take out their flexibility to manage the jobs. Also,since they change
people from the activities time to time ( every month, its horrible), it will have an impact on
rates/hour aswell.
So what I have done is as mentioned by Dave proceed upto Step 3 i.e assign roles ( with rates and role ids)
to all activities for all projects. I will get a time phased role allocation for any one project in the
assignment view in P6. Group it based on the roles and then click anywhere on the layout,select all and
copy and paste it on a new excel spreadsheet ( no need to use export function as in P3 ). Do that for all
other projects.Then you can play around in excel (may have to use pivot table etc) to get the desired result.
You will get total hours of any roles for any time period. Do histograms and what ever you require.
We have to spend a bit of time in P6 project Management module. This might be easy in P6 portfolio
Management module.