BC allows to do some project planning that is then correct to the costs (and billing) transactions. This is nice for detailed planning of what needs to be done on a project.

But a most common requirement is to be able to create financial budgets on a project, to track revision of those budgets, to compare what still needs to be done versus actual costs either at the top project level, at the project task level (WBS) or even by expense category.

This module exist in project operations but there is nothing apart from planning in BC which makes it hard to sell as an ERP that include any project module at all.