In P6 7.0 - We created a second project after scrapping the first project. So the client decided they wanted historical activity in the second project and added an activity that has a start date that is prior to the project start date. They loaded the activity with resources and budgeted and actuals. Since the project start is way after the activity start (1 year), P6 seems to be jamming all the budgeted and actuals into a range of PS and DD. My question is whether it would be a good idea to change the project start at this point to be before the activity or to just add the cost as expense line.
I think..you need to review how many activities are started before project start date.
If its very few, divide the activity and the part which is completed before project start date is add as expense line.
If number of activities are more started before project start date then change project start date. You can incorporated loss time as non working days.