Tracking the projects

I hope every one will be fine. I need some help form u guys , I am planning engineer in a plant services department which deals with oil and gas , petrochemical plant turnarounds. We do turnarounds which merely have 15 to 20 days. My organization is interested in cummulative progress of the day. What we do , we plan , load resources , distribute them on 20 days (Bell shape) and start tracking by exporting the manhours to excel and than create S curve.This is simple way of tracking  I wanted to track the projects via baselines in primavera p6.

a. Once i assgn the baseline , how can i track the progress ?After entering the manual entries , should i need to  schedule by applying actuals or by updating the schedule

b. Do i need to schedule everytime i update the porject ,so that i can have the finish date ?

c.If my actual work is not as per progress, e.g. i started the inspection of 2 vessels by giving them the finish to start relationship in basline, but in actual , it follows a start to start relationship..do i need to change the relationship while i am tracking the projects?

Regards 

Mohsin