Coverage Calculation (Count / Count Distinct)

DA1981 — Mon, 26 Jul 2021 08:57:17 GMT

I am struggling to work out what I think should be some fairly straightforward DAX and can't find anything in the forum. Apologies if I have missed another post.

I have a client and product columns. What I am trying to achieve is to calculate what 'client coverage' each product has. Client coverage is defined by the percentage of clients that have a product and is between 0% and 100%. What is throwing a spanner in doing a COUNT(Products)/COUNT DISTINCT(Clients) is that some clients have some products more than once; the way I want my calculation to work is to be binary: A client has it or doesn't. I am not interested in how many times they have bought it.

Example data:

Client	Product
A	1
A	2
A	3
B	1
B	1
B	2
C	1

In this instance, all clients have product 1, but Client B has it twice. Therefore coverage should be 100% not 133% if I did the formula above.

Expected caluculated output:

Product	Client Coverage
1	100%
2	67%
3	33%

Any help much appreciated. Thanks in advance.

Re: Coverage Calculation (Count / Count Distinct)

lbendlin — Mon, 09 Aug 2021 00:43:10 GMT

Here's a calculated column that you can use for that.

Coverage = DIVIDE(CALCULATE(DISTINCTCOUNT('Table'[Client]),ALLEXCEPT('Table','Table'[Product])),DISTINCTCOUNT('Table'[Client]))

Make sure to set its aggregation to "Don't summarize".

topic Re: Coverage Calculation (Count / Count Distinct) in DAX Commands and Tips

Coverage Calculation (Count / Count Distinct)

Re: Coverage Calculation (Count / Count Distinct)