1) As per image legend, blue and green lines represent planned schedule, perhaps from a baseline schedule with no progress.  Actual [red solid line] and to complete early [black slash line] represent current schedule, missing to complete late that should start at same point to complete early starts.

The image shows different versions of the schedule, each with different data date.  For those with no progress, no actuals, their data date happens at first point. For those with progress data date happens where actuals finish and remaining [early&late] starts.

2) Any update of progressed schedule shall match actual to the left of data date, to the right it will show updated early and late lines.

Hey is anybody producing these S-Curves unsing costs with Asta PP? I am pretty new to this side of things. I am putting together a forecast of a cost loaded and resourced programme to track 2 internal budgets, and then plan to update actuals throughout the project to keep track of any variations which may occur. 

Am I right in saying that  to include 2 internal budgets, one on BOQ estimates, and another on Tender actuals, Would I be right in saying that to produce both curves I need to baseline the project 2 times in its original "planned schedule position"? and then rejig the amounts for the second baseline?. Essentially what I plan to do is:

1. Load in costs which have been broken down to the activity level from a BOQ, then baseline.
2. Delete the above costs, and load in Tender/Actuals, then Re-basleine the project in the same position.
3. Record Actual cost (Variations) throughout the project in line with Progress. 

Does this approach sound like the right way to go about this?