This is a post by Emma Rudeck on the Concurrent Engineering Site.
As you know all too well, many design changes occur late in the process or even many months after the original design was created. Late stage design changes can be a real problem for companies. You want to be able to respond quickly to the challenge, without having to sacrifice your design intent. But, this isn’t always easy to do.
PROBLEM #1 LATE STAGE DESIGN CHANGES CAN BE VERY TIME-CONSUMING
Unanticipated changes create real pressure on project schedules. Often, this can result in teams having to work overtime or even into the weekend to make sure that a project is finished on time, especially if the change is going to radically alter the geometry of the part. If you’re relying on just a parametric design approach, then your models can fail if the constraints and features are not unravelled before redefining the geometry.