How can I track multiple time differences simultaneously based on another column?

Hi all,

I need help in tracking multiple smiultaneous timestamps.

I have a simple table like the one attached.

Table with columns Person ID, Time, Worktype and Index

This is a table that is created when an employee (Person ID column) logs when starting to work at a particular position (Worktype column), combines positions, splits positions, goes on a break or goes home.

I need to track both the total time an employee has worked in any position (POSITION-A, B, SOUTH, WEST etc.) and the time worked in each position separately and also the time spent on breaks.

Combining and splitting of positions complicates things. For example an employee might start working at POSITION-A, then combine POSITION-A and B, then continue only on POSITION-A and then go on a BREAK. In this scenario the employee should have working time at POSITION-A for the entire session and at POSITION-B only from the period that the positions were combined. There are also several options instead of a BREAK where the employee can go to, for example OFFICE or OFFWORK.

I'm able to calculate the time difference between two consecutive Worktype stamps of the same person with the following code.

Elapse btw stamp and previous stamp (min) = 

VAR _curTime =
    myTable[Time]

VAR _pasttime =
    CALCULATE (
        Max(myTable[Time]) ,
        myTable[Time] < _curTime,  
        ALLEXCEPT (myTable, myTable[Person ID])
        )

VAR _dif = 
    IF(ISBLANK(_pasttime), 0 ,DATEDIFF ( _pasttime, _curTime, MINUTE ))

RETURN_dif

This is what the table looks like at the moment.

Table with "Elapse btw stamp and previous stamp"

What I can't figure out is how to put the elapsed time and the name of the person on the same row so I can get the correct info on how many minutes the person was on a break (Index 6) or at a certain position. Also I don't know how to take into account combined positions.

Any help would be highly appreciated.