Forecasting Accuracy Model

SuperJay182

New Member
Joined
Apr 11, 2018
Messages
1
Hi all,

First time posting so apologies if I'm not overly clear.

I've been set a task that is bending my brain a little bit -

The document has 3 tabs - Historical Calls, Forecast Calls, Accuracy

-Historical Calls - actual data
-Forecast Calls - historical data which is either like for like, or daily total/ % share of that time interval
-Accuracy - historical / forecast %

What I need to do is, first let forecast be calculated based on the data I have in the actuals & sums behind it, but for that forecast to be then 'locked in' 3-month intervals with the data I have, regardless of if I continue to add new actual data.

Essentially we need to use the actuals to fuel the forecast, but then be able to measure the accuracy of this (without additional data constantly updating the forecast)

Currently, if I add any new actual data, it updates the forecasts I've already calculated

The only solution I've got so far is one the forecast is originally generated, copy and paste the values over the top as figures removing the formula.... which is a workaround but not a long-term solution.

-Is there a simple tweak to the formulas behind the forecasts to stop them updating once calculated?

Thanks for any help! Sorry if this doesn't make sense - I'm having trouble making sense of the issue, to begin with!
 

Excel Facts

Format cells as time
Select range and press Ctrl+Shift+2 to format cells as time. (Shift 2 is the @ sign).
You can use a change event to paste values when a formula updates a value it will call the event
 
Upvote 0

Forum statistics

Threads
1,213,538
Messages
6,114,218
Members
448,554
Latest member
Gleisner2

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