Data Freshness Columns

[clizbe]

Just had a nice chat about models and data with Leo. He had the idea that data should have "Last Updated," "Valid Until," and of course "Source" columns.
I think the "Valid Until" is really nice because if you're digging deep to update the data you have an idea how permanent it is or whether it will change quickly. Whereas when looking at the data later you don't have that insight, and would need to re-evaluate everything with the same reports/experts.

When updating data, just sort the "Valid Until" column to find stuff that probably needs updating, and maybe check the oldest "Last Updated." :)

This is for data that comes from many sources (including experts) that's basically updated by hand. I think with full dataset import it's assumed you'd have the source, date, and general knowledge of validity duration.

Obviously this only works if people fill in the columns.

@suvayu @datejada @gnawin @IsaiMaganTNO