Does E1 have a work order scheduling calculator for variable lead-time items?

When faced with a large backlog of past due items, it would be desirable for planners to get a quick answer on how long it will take to make various quantities of variable-lead time items. MRP just sets the request date to the earliest due date after your freeze fence and tells you to start now, giving you an impossible plan. Or we can go into Work Order entry and add a new work order, set the request date to a best guess and see what start date is calculated. But this leads to a lot of unnecessary work changing