Compare of Compare

What it is:

 

Compare of Compare (CoC): This mode allows you to compare 2 waterfalls.
The secondary waterfall is defined by turning Compare of Compare on (in settings) and then defining the start of your secondary waterfall (Start_CoC) and the end of your secondary waterfall (End_CoC)

 

In the backstage, DataMa will then run the same analysis for the 2 definitions of start and end, and then display the results of the secondary analysis in the background. Main output is :

  • In the Waterfall « Chart », the secondary waterfall is displayed in the background
  • In the Executive summary, the trend between secondary and primary analysis will be worded

When to use it

Compare of Compare mode is particularly useful when you run regularly the same analysis for different periods of time.

 

We can take the exemple of this dataset .

You’re in Week 3 2019, and you want to compare to Week 3 2018. Using DataMa Compare, you get this:

Now, the real question that you’re asking when you run this every week (so you ran this also in week 2) is: how is that different from last week?

This is where you activate Compare of Compare, and add Week 2 YoY analysis as secondary waterfall (yes, this assumes you also kept week 2 in the source you’re analysing).

And here is the results:

 

Now you get a new insight: not only you know that Checkout per session is decreasing -27% on Week 23 from 2018 to 2019, but you also know that in Week 2 that same variation was -29%. So it’s bad, but it’s not as bad as it was last week. 

You get the idea.

The good news is that Compare of Compare option is saved with your saved version, so when you reload it (or send it through email), it will be automatically up to date.