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excel - employee availability remaining after scheduled

first sheet ;
A1 is the earliest time an employee can start
B1 is the latest an employee can stay

second sheet:
A1 is the time an employee is schedule to start work
B1 is the time an employee is schedule to end work

third sheet:
this is where i need help.  
A1 and B1 are to be filled with formulas that reflect the remaining availability an employee has after being scheduled on "sheet 2".

i hope this is clear.  the file i have is quite massive and contains sensitive information so i don't want to post is here.

i appreciate your help!!
douglas carley
douglas carley
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1 Solution
Pls try


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Danny ChildIT ManagerCommented:
Here's an example.

I wasn't sure if you wanted the third sheet to show the possible Start Time or the Amount of Time they would have, so I did both...

I also added some conditional formatting on the Actual Time sheet to check whether they had worked outside the times specified on their Scheduled sheet.
Danny ChildIT ManagerCommented:
The third sheet shows the possible time of day they could start on the left, and then the amount of time they'd have available on the right.

Having multiple tabs open allows easy checking that it's doing what you want...

IMPORTANT NOTE - all times are entered in Excel's preferred format - eg 8am is entered as 8:
8pm is entered as 20:
Half past 11 in the morning would be 11:30
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douglas carleyAuthor Commented:
thanks danch99!  that's pretty close to what i want.

what you did with the hours is close to what i'm looking to do.  if i have an employee available from say 09:00-18:00 and i schedule them 12:00-15:00 i would like to have something reflect that that person is now available for more hours of work 09:00-12:00 and 15:00-18:00.

i'm going to have to rework how i have my page set up.  thank you for your work!  it helped me realize a flaw in my request.  on the third sheet i'm going to need to have twice as many column i think.  on set for hours available before and one set for hours available after.  please let me know what you think :)
douglas carleyAuthor Commented:
i put together a rough file of what i think the final product might look like (without the formula(s) i need on the third sheet).
Danny ChildIT ManagerCommented:
Hi Douglas,
I think my first version of the sheet already told you how many hours were available both before AND after their actual shift - there were 2 tables, and this was on the one on the right?

However, I've gone a bit further and totalled these for you now, on the 4th tab.

The logic you basically need to follow is
(LatestFinish - EarliestStart) - (ActualFinish - ActualStart)
ie Their maximum possible hours minus their actual hours

Note, if any of them have shifts that run from 1 day to the next, ie they start before midnight, and end afterwards, this will need a huge amount of rework as a solution, as you need to deal with the maths not working
ie 4am - 10 pm = 6 hours in reality, but Excel will do 4 - 22 in this case, and come up with -18....

I had to change the formulas on the 3rd tab a bit, to insert Zero values if there was no availability, but to keep the table clear, I added a custom format to hide them.
Same format used on the 4th tab too.
douglas carleyAuthor Commented:
it looks like everything i need is here :)  thank you.  i'm going to rework what goes where but i don't think i need anymore help.  it seems it was more simple than i thought it would be.  you were able to look at it with better eyes than mine.  i thought it was going to be a very complex formula.
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