Spread value across time between 2 dates

your time req in months is not going to fly when you are looking at partial months especially at both ends.

i believe you need to use datediff to get the count of days filter out any non workdays then determin how many hours per day each row is projected to meet your est. 50.

this is psudeo code.

measure =: 

var __hours = 50

var __dayrange = calculate(datediff (facttable[start_date], facttable[end_date], Day),'datetable'[isweekend]=false)

var __result = divide( __dayrange, __hours)

return __result

something like this