Bom dia Raul,
I would make a diferrence regarding relative weight between the phases and how to track physical progress (It would also help to know what kind of project you have on hands).
Normally in a project you sold to your client the project divided in diferent chapters :
1 - Engineering (and price) - normaly client also knows the global price
2 - Procurement (and price)
3 - Construction (and price)
So in order not to disturb this relations the overall % progress would be calculated having in consideration the relative weights of the budget sold to client (this method avoids a lot of questions in the future)
Now the phisical progress and relative weight of individual activities
- Engineering
If a detaield documetn list to be produced exists, then use it and atribute a relative weight to each doc (in MH and according your own budget - meaning total 100% of engineering would sum up the total MH you have to spend in engineering).
- Procurement
In the type of projects I am involved normaly I give a relative weight to each activity based on my budget value (not MH) for that particular item (total procuremtn phase shall sum my total value budget for the procurement)
Physical progress can be taken from progress reports of manufacturers, expediting teams, etc for each item.
Construction
Here it would be good to use again MH. You have to calculate (or distribute your MH budget) the required MH for each activity.
Phisycal progress has to be calculated according each discipline (excavation in M3, piping in tones, electrical cables in Klms, etc, etc)
Progress curves
Can be drawn directly from above explained methods
Hope it contributes to solve part (rsrsrsr) of your questions.
BR
JMFrade