Diff between retained logic scheduling / Progressive over ride scheduling / Actual dates scheduling

Hi,

I wrote an article explaining How does Retained Logic, Progress Override and Actual Dates in Scheduling Options work?

Kindly read it here : https://doduykhuong.wordpress.com/2016/06/08/how-does-retained-logic-progress-override-and-actual-dates-in-scheduling-options-work/

All the optiion will not give you differet results if there is no out of sequence activities in the schedule however if there are out of sequence activities the calculation will be differrent for different options.

Retained Logic (RL): The retained logic schedule calculation setting holds schedule logic constant during calculation of in progress schedules.  The calculation adds activity remaining duration in the forward pass calculation for early dates and waits until activity predecessors are completed.

Progress Override (PO):  When the progress override schedule calcluation option setting is utilized, Oracle Primavera P6™ignores the predecessor activity relationships and calculates the activity completion date based on its own remaining duration.

Actual Dates (AD): When the actual dates schedule calcluation option setting is utilized, Oracle Primavera P6™sets the late finish date of the predecessor activity one day before the actual start of the out of sequence activity. This normally creates negative float to predecessor activities.

in retain logic links will be calculated from the early dates regarless of actual dates; but in actual dates option it will be calculated from the actual dates not from early dates