Power BI calculating time difference excluding weekends and non working hours - powerbi

Question

I have the below table and calculating the durations between First_change_Date and Create_date using this DAX formula:
Response_time =
VAR Minutes = DATEDIFF('otrs ticket Response'[otrs ticket.create_time], 'otrs ticket Response'[First_Change_time],MINUTE)
var days =INT(Minutes/1440)
var hourNo=INT(MOD(Minutes,1440) / 60)
var minuteNO=MOD(Minutes,60)
RETURN
CONCATENATE( CONCATENATE( CONCATENATE(days,"d "), CONCATENATE(hourNo, "H ")), CONCATENATE(minuteNO, "m "))
I want to exclude the weekends (Friday, Saturday in my case) and non working hours (5:00pm - 9:00am)
Data:

Answer 1

For my client, I have created a logic. First created a WorkingHoursTable.
Then created a calculated column with the following formula, in the table which has the start and end dateTime's.
Working Hours Between Dates =
var startDate = [yourStartDateTime].[Date]
var startTime = [yourStartDateTime] - startDate
var endDate = [yourEndDateTime].[Date]
var endTime = [yourEndDateTime] - endDate
var firstFullDay = startDate + 1
var lastFullDay = endDate - 1
var inBetweenWorkingHours =
IF(
firstFullDay > lastFullDay,
0,
SUMX(CALENDAR(firstFullDay, lastFullDay), LOOKUPVALUE(WorkingHoursTable[WorkingHoursInAllDay], WorkingHoursTable[WeekDay], WEEKDAY([Date], 2)))
)
var firstDayStart = LOOKUPVALUE(WorkingHoursTable[StartTime], WorkingHoursTable[WeekDay], WEEKDAY(startDate, 2))
var firstDayEnd = LOOKUPVALUE(WorkingHoursTable[EndTime], WorkingHoursTable[WeekDay], WEEKDAY(startDate, 2))
var lastDayStart = LOOKUPVALUE(WorkingHoursTable[StartTime], WorkingHoursTable[WeekDay], WEEKDAY(endDate, 2))
var lastDayEnd = LOOKUPVALUE(WorkingHoursTable[EndTime], WorkingHoursTable[WeekDay], WEEKDAY(endDate, 2))
var effectiveStartTime = IF(startTime < firstDayStart, firstDayStart, startTime)
var effectiveEndTime = IF(endTime > lastDayEnd, lastDayEnd, endTime)
return
IF(
startDate = endDate,
24 * IF(effectiveEndTime > effectiveStartTime, effectiveEndTime - effectiveStartTime, 0),
var firstDayWorkingHour =
24 *
IF(
startTime > firstDayEnd,
0,
firstDayEnd - effectiveStartTime
)
var lastDayWorkingHour =
24 *
IF(
endTime < lastDayStart,
0,
effectiveEndTime - lastDayStart
)
return firstDayWorkingHour + lastDayWorkingHour + inBetweenWorkingHours
)
In this formula you just set the first 4 variables correctly. Then it will calculate total working hours. Unit will be in hours.
Edit: As I see from your post that your weekends are Friday and Saturday, you will need to use WEEKDAY functions slightly different. You can send 1 as a second parameter to WEEKDAY function, instead of 2. You will also need to modify the WeekDay column of WorkingHoursTable.
After this one, you can parse it to '9d 20H 52m' with your formula.

Answer 2

I split the date/time in to date and time columns. I then use a date dimension, where one of the columns is "Is Working Day" = TRUE(), based on which day of the week it is (a simple calculated column). In the time dimension, you do the same to identify "Working Hour" = TRUE(), again, a simple calculation.
Once you have the dimensions in place it then becomes very easy to build your calculations to include / exclude.