What Kellogg Professor Got Wrong about Effectiveness and Honesty in Data Visualizations

Steven Franconeri, a Kellogg School of Management professor, has written a good article "4 keys to Effective – and Honest – Data Visualizations". I thought that he made some solid points; however, I strongly disagree with his opinion about what makes a chart honest or dishonest. https://youtu.be/E6A0cry7PUw As you look at the global temperature trend … Continue reading What Kellogg Professor Got Wrong about Effectiveness and Honesty in Data Visualizations

Power BI Best Practices Analyzer in Tabular Editor

Wanted to do a quick video on how to use Power BI Best Practices Analyzer using Tabular Editor. There was a great blog post on it here: https://powerbi.microsoft.com/en-us/blog/best-practice-rules-to-improve-your-models-performance/ that covered a lot of details on what best practices were there to be aware of as well as the tool itself. However, the article seemed to … Continue reading Power BI Best Practices Analyzer in Tabular Editor

Progressive Discount (Tax or Commission) Calculation (Power BI DAX Tutorial)

I have to warn you, this is NOT a level 100 or even 200 tutorial. If you decided to proceed, that you absolutely positively have to get that progressive calculation work and I will have to assume that your DAX is pretty good, otherwise you would not be even attempting to tackle this problem. Also, … Continue reading Progressive Discount (Tax or Commission) Calculation (Power BI DAX Tutorial)

How Good are Your Chart Choices?

I found this interesting chart on Datawrapper.de and it made me think about how (and whether) my chart selections also changed over time. https://youtu.be/NV5QeQdnv1Y (Datawrapper is a pretty cool tool that allows users to upload their data and create pretty stunning visualizations) In this chart, Datawrapper has analyzed changes in distribution of chart styles selected … Continue reading How Good are Your Chart Choices?

Tools to Check If Your Reports are Color-Blind People Friendly

I have to admit that up until recently I have been oblivious to this topic myself. I am not a graphics designer, but I have always tried to pay attention to the esthetics of my reports/charts; picking colors and palettes was something that I would spend a considerable amount of time obsessing about. A short … Continue reading Tools to Check If Your Reports are Color-Blind People Friendly

Constant Currency Analysis (Power BI DAX Tutorial)

Constant currency analysis is very popular when we need to take out FX rate fluctuations from our analysis. There are many different methodologies that companies used for determining what constant FX rate to apply to the historical values. In our tutorial, we will take a look at the time window for our analysis, figure out … Continue reading Constant Currency Analysis (Power BI DAX Tutorial)

Data Persuasion with BI: Top 5 Reasons Your Last Presentation was a FAIL

Unfortunately, life is hard and in BI world we are guaranteed to fail with our Data Persuasion every now and then. Having failed with my BI presentations many a time, I decided to write this article and frame up my top five reasons why I did and also suggest a few things for what you … Continue reading Data Persuasion with BI: Top 5 Reasons Your Last Presentation was a FAIL

Cumulative Discount or Commission Calculation (Power BI DAX Tutorial)

If you are looking to challenge your DAX skills while trying to figure out how to calculate a Cumulative Discount (or a Cumulative Commission) then this tutorial is for you. https://youtu.be/9hGowlw4YPc A Cumulative discount is calculated by finding the cumulative sales in the specified discount window, and then, using the cumulative sales as the parameter … Continue reading Cumulative Discount or Commission Calculation (Power BI DAX Tutorial)

How to Calculate Revenue and Margin Using Price and Cost History Tables (Power BI DAX Tutorial)

I use Sales data a lot in my tutorials and usually the Sales Fact table will have the following fields in it: DateProductRevenueUnits Along with a bunch of other stuff…. Now, it is actually very common for a company to only provide Units in the Sales Table along with a Price History and/or Cost History … Continue reading How to Calculate Revenue and Margin Using Price and Cost History Tables (Power BI DAX Tutorial)