Thursday, August 25, 2016

Troubleshoot:Calculate length of job excluding multiple breaks

Calculate length of job excluding multiple breaks

Hi All
I need a formula to calculate the length of a job based on the following:
start date and time
end date and time
it needs to exclude 4 scheduled breaks in a day and have the option of including weekends (if they are planned to be worked).
Bank holidays/plant closed days also need to be excluded.
Is this possible...?

Anwsers to the Problem Calculate length of job excluding multiple breaks

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Apologies for the delay, I posted one response then quickly realised I was suffering from muddled thought and deleted it.
Try this one.
Put the code in a general module and on the worksheet call with:-
Note A1 and B1 can be any cells but they must be a properly formatted date and time.

This includes weekend working format as general
This excludes weekend working format as general
The elapsed time is returned as a decimal hours and minutes but if you look at the last couple of lines of code there's a commented out line that will return the time as HH:MM.
If you use this line then note the comment in the code about the formula cell

Function elapsed(start As Range, finish As Range, WeEnd As Boolean) As Double
Dim FullDays As Long, Breaks As Long
Dim firstdaybreak As Double
Dim LastDayBreak As Double
Dim AllBreaks  As Double
Dim FullTime As Double
Dim StartDayHours As Double
Dim EndDayHours As Double
Dim Break1 As Double
Dim Break2 As Double
Dim Break3 As Double
Dim Break4 As Double
Dim StartTime As Double
Dim EndTime As Double
'Calculate full days for a job
If WeEnd Then
    FullDays = WorksheetFunction.Max(0, Int(finish) - Int(start) - 1)
    FullDays = WorksheetFunction.NetworkDays(start, finish) - 2
End If
'Calculate breaks for full days
If FullDays > 0 Then Breaks = FullDays * 2
    Break1 = CDbl(TimeValue("08:30")) '15 minutes
    Break2 = CDbl(TimeValue("12:00")) '45 Minutes
    Break3 = CDbl(TimeValue("15:30")) '15 Minutes
    Break4 = CDbl(TimeValue("19:00")) '45 Minutes
'Srart and end times
    StartTime = CDbl(TimeValue(Format(start, "HH:MM")))
    EndTime = CDbl(TimeValue(Format(finish, "HH:MM")))
'Calculate first day breaks
    If StartTime <= Break1 Then firstdaybreak = 0.25
    If StartTime <= Break2 Then firstdaybreak = firstdaybreak + 0.75
    If StartTime <= Break3 Then firstdaybreak = firstdaybreak + 0.25
    If StartTime <= Break4 Then firstdaybreak = firstdaybreak + 0.75

'Calculate last day breaks
    If EndTime >= Break1 Then LastDayBreak = 0.25
    If EndTime >= Break2 Then LastDayBreak = LastDayBreak + 0.75
    If EndTime >= Break3 Then LastDayBreak = LastDayBreak + 0.25
    If EndTime >= Break4 Then LastDayBreak = LastDayBreak + 0.75
  If Format(start, "DDMMYYYY") = Format(finish, "DDMMYYYY") Then
  'calculate breaks if job starts and finishes on same day
  If StartTime <= Break1 And EndTime >= Break1 Then AllBreaks = 0.25
  If StartTime <= Break2 And EndTime >= Break2 Then AllBreaks = AllBreaks + 0.75
  If StartTime <= Break3 And EndTime >= Break3 Then AllBreaks = AllBreaks + 0.25
  If StartTime <= Break4 And EndTime >= Break4 Then AllBreaks = AllBreaks + 0.75
    AllBreaks = firstdaybreak + LastDayBreak + Breaks
  End If
  'calculate full hours
  If Format(start, "DDMMYYYY") <> Format(finish, "DDMMYYYY") Then
  StartDayHours = (TimeValue("22:00") - TimeValue(Format(start, "HH:MM"))) * 24
  EndDayHours = (TimeValue(Format(finish, "HH:MM")) - TimeValue("06:00")) * 24
  FullTime = (FullDays * 16) + StartDayHours + EndDayHours
  FullTime = (CDbl(TimeValue(Format(finish, "HH:MM"))) - CDbl(TimeValue(Format(start, "HH:MM")))) * 24
  End If
    'This returns the elapsed time as decimal
    elapsed = FullTime - AllBreaks
    'This returns the elapsed time as time
    'If you use this cline format the cell with
    'a custom format of [HH]:MM
   'elapsed = (FullTime - AllBreaks) / 24
End Function

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