Formula to measure moving averages

Alistair Mclean

Hi there. I’m trying to find out if I can use a formula to calculate the average project time for the last 10 projects of a specific category.

I have a sheet that is collecting project data which includes the category and the total time spent. What i need to do is calculate the average total time spent for the last 10 projects of a specific category.

any help gratefully received

Andrée Starå

Hi @Alistair Mclean

I hope you're well and safe!

Can you describe your process in more detail and maybe share the sheet(s)/copies of the sheet(s) or some screenshots? (Delete/replace any confidential/sensitive information before sharing) That would make it easier to help. (share too, andree@workbold.com)

I hope that helps!

Be safe and have a fantastic week!

Best,

Andrée Starå | Workflow Consultant / CEO @ WORK BOLD

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Alistair Mclean

@Andrée Starå - thanks for responding. To explain in some more detail. i have a sheet where i am collecting key bits of information regarding a program of projects that im managing. This includes the project type, the project go live date, the project total duration and of course the project name.

I would like to measure the average duration for each type of project type (basic, standard and advanced) but i only want to measure the last 10 projects based on the go live dates. I have created a mock up of the sheet and have shared this with you

thanks

Alistair

Andrée Starå

@Alistair Mclean

Glad we got it working!

Here's the formula for everyone.

=AVG(COLLECT([Total Project hours]:[Total Project hours], 
[Project type]:[Project type], "Basic", ID:ID, >(INDEX(MAX(ID:ID), 1) - 10)))

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