What are the Best Practices for usage of Plant Maintenance Orders?

Hi Experts,

We are midsize company and are fairly active with our use plant maintenance orders. In addition, our PM orders are linked to WBS Elements. Thus, when executing WBS Element reports with a high volume of maintenance orders the performance is impacted. Given that there are various costs associated in the volume of orders that a company may use (i.e. settlement/assessment performance, report performance, master data maintenance, attempting to aggregate the orders together to understand and view costs at a higher process level), what are other companies doing to keep a balance between the plant maintenance users and the financial/management reporting users? Is total expected cost ever factored in the strategy for maintenance orders?

I look forward to your comments.