Using Circular Reference to Schedule in Excel

bobo999

New Member
Joined
Feb 25, 2013
Messages
35
I am trying to solve a scheduling problem in excel.

What I have are dozens of Tasks similar to this output.

Saturday3-10-18 6:00 AMSunday3-11-18 12:12 AM Length of task 18.3hours
Saturday3-10-18 6:00 AMSunday3-11-18 12:12 AM
Saturday3-10-18 6:00 AMSunday3-11-18 12:12 AM

<tbody>
</tbody>
Sunday

What I have are blocks of time that tasks cannot be run during, ie:
Outage StartOutage End
3-9-18 12:00 PM3-10-18 10:00 AM
3-12-18 12:00 PM3-12-18 9:00 PM
3-13-18 12:00 PM3-13-18 11:00 PM
3-14-18 12:00 PM3-14-18 11:00 PM

<tbody>
</tbody>

What I am trying to do is calculate how the tasks overlap the windows where work cannot be done using sumproduct.
Q267 is task start and R268 is task end
Code:
 <outageend)*(r267><outageend)*(r267>SUMPRODUCT ( ( Q267 < outageend ) *  (  R267>=outagestart)  ) equals 1 (formatting is strange here)
<outageend)*(r267><outageend)*(r267><outageend)*(r267>
This seems to yield a binary yes task overlaps for one instance.

The concrete question I have, is I want to calculate using circular references or some other method, how much of my tasks overlaps those black out windows. Increment the task length by the overlap amount. Now the big question is of course, if after this increment, do I get pushed into another black out window, how many times will the circular reference iterate before the final solution. How can I achieve this?

The next step would be to calculate how much overlap there is, this is something I can't figure out. Following that, assuming circular reference iteration works as it should, I should be ok.</outageend)*(r267></outageend)*(r267></outageend)*(r267></outageend)*(r267></outageend)*(r267>
 
Last edited:

Excel Facts

Is there a shortcut key for strikethrough?
Ctrl+S is used for Save. Ctrl+5 is used for Strikethrough. Why Ctrl+5? When you use hashmarks to count |||| is 4, strike through to mean 5.

Forum statistics

Threads
1,216,466
Messages
6,130,795
Members
449,593
Latest member
morpheous

We've detected that you are using an adblocker.

We have a great community of people providing Excel help here, but the hosting costs are enormous. You can help keep this site running by allowing ads on MrExcel.com.
Allow Ads at MrExcel

Which adblocker are you using?

Disable AdBlock

Follow these easy steps to disable AdBlock

1)Click on the icon in the browser’s toolbar.
2)Click on the icon in the browser’s toolbar.
2)Click on the "Pause on this site" option.
Go back

Disable AdBlock Plus

Follow these easy steps to disable AdBlock Plus

1)Click on the icon in the browser’s toolbar.
2)Click on the toggle to disable it for "mrexcel.com".
Go back

Disable uBlock Origin

Follow these easy steps to disable uBlock Origin

1)Click on the icon in the browser’s toolbar.
2)Click on the "Power" button.
3)Click on the "Refresh" button.
Go back

Disable uBlock

Follow these easy steps to disable uBlock

1)Click on the icon in the browser’s toolbar.
2)Click on the "Power" button.
3)Click on the "Refresh" button.
Go back
Back
Top