Getting my head wrapped around the PMP / PMI earned value methodology. Traditionally have tracked a project budget vs the actual spend on a simple basis with that being the variance etc.
The scenario is that you built your original WBS / costs then get hit with work that was 100% not planned. My thought here was that these items get tracked separately and don't belong to a specific WBS because they were not planned. This way you can show the progress of the original scope of work and then clearly identify the items that were 'out of scope'.
That being said I also see that perhaps the better way to do this is that if that new scope of work is approved it's a change order and you should be revising your budget accordingly. The down side I see is that the the
new estimate at completion is now showing 'on budget' when in reality it is beyond the original budgeted amounts.
Is there a preferred or better defined method to manage these changes of scope and resulting costs?