Power Pivot: Dynamically Identifying Outliers with DAX


Data Savvy

I have been working on a project in which we were looking at durations as an indicator of service levels and customer satisfaction, specifically the maximum duration and average duration. We built a small dimensional data mart in SQL Server to house our data, then pulled it in to Excel using Power Pivot so we could make a few Excel and Power View reports and provide the client with the model for further ad hoc reporting and analysis. After the first iteration of development, we got feedback from the client that there were several outliers that were skewing the metrics. They wanted to see average and max duration for whatever group of objects they had chosen and then see the calculations after removing the top and bottom 5% of values.

Here is a small sample of my fact table, called Object Processing.  Field names and some small details have been…

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