I'm getting two different requirements related to how due dates should be used. On one project the PM indicated that as we moved something to a new stage we should change the due date to reflect the date that stage is due; on another project the PM is saying you never change the due date.
The first option is what I think should be used otherwise how would you ever track when things are late or not, however, the other PM said if you change the due date you change history, that makes no sense.