Validate your metric by understanding its value and impact over time, dispersion, and sample population. You can click View more on a metric card on the Metrics impact tab to understand its trend over time and statistical information. In addition, you can:

Review the Impact snapshot chart for an uptodate, aggregated view of the expected impact over baseline for each treatment and an estimated range for that impact

Select more treatments, to compare the impact against the baseline in the Impact over time chart

Review the aggregated metric value for all treatments in the Values over time chart
The charts and tables are reflective of what you preselect within the Metrics impact tab, such as the feature flag version, targeting rule, treatment, and baseline chosen for comparison.
Accessing metric line charts and tables
To access metric line charts and tables:
 From the left navigation panel, select Feature flags.
 In the Feature flags panel, select your desired feature flag.
 Click the Metrics impact tab in your feature flag, in the Key metrics area, click the metric you want to analyze.
 Select the desired chart to review.
Metric meta data
The metric meta section displays the meta information associated with that metric such as owner, tags, and description.
Line charts
You can view line chart data for a feature flag version. Hover over a point on the line chart to update the values in the table.
Before analyzing line charts, make sure the filters you are interested in are applied on the feature flag Metrics impact tab (e.g., the feature flag version, targeting rule, or baseline).
Viewing impact snapshot
The Impact snapshot chart shows an uptodate, aggregated view of the expected impact over the baseline for each feature treatment (variation) and an estimated range for that impact.
Dimensional analysis
On the impact snapshot chart, you can analyze data for key metrics using dimensional analysis. This allows you to:
 Unlock deeper insights. Understand unexpected spikes in your metric results that are driving topline metrics at a dimensional level.
 Run more datadriven experiments. Iterate on your next hypotheses or run followup experiments using the insights gained on what worked or didn’t in past experiments.
Important: Multiple comparison correction is not applied to dimensional analysis.
Before you can select a dimension to analyze on the metric Impact snapshot, you need to send a corresponding event property, for the event measured by the metric. (You can set event properties in code when you call the Split SDK's track
method.) An Admin also needs to configure dimensions and values to show them in the Select a dimension dropdown.
To view dimensional analysis on the metric Impact snapshot:
 Select a baseline treatment on the Metrics impact tab.
 Select a dimension in the Select a dimension dropdown. The Impact snapshot for the selected dimension is displayed.
 In the Underlying data table below the line chart, you can select dimension values to be shown on the line chart.
Admins can choose the dimension values that are shown in the Underlying data table by clicking Manage dimensions. Values that are not specified as dimension values in Admin settings are listed under “Other”.
If you have questions or concerns about your impact snapshot, contact support@split.io.
Viewing impact over time
The Impact over time chart allows you to visualize the aggregated value of the metric in each treatment of a feature flag. The chart represents the cumulative impact and is based on all the data Split has received up until the last calculation update. You can hover over a point on the chart to update the values in the table.
To view impact over time:

Select a baseline treatment on the Metrics impact tab.

Select treatments for comparison in the underlying data table.
Viewing value over time
The Values over time chart allows you to visualize the average value of the metric for each treatment of your feature flag. You can also view how the estimated range of the metric value has changed over time.
Metric tables
The following section describes the tables shown on the metric details page below the three time charts.
Impact
All criteria are necessary and sufficient to view your data when you select a treatment and a baseline treatment. A statistical comparison is made with the analyzed metric. A description of these columns are shown below.
Title  Description 

Impact  The relative impact between the treatments you are comparing. 
Error Margin  The chance (dependent on your organizations default significance threshold) that the interval between the mean +/ the error margin contains the true metric value. 
Pvalue  The probability of seeing a result as least as extreme as the result we observed, if the null hypothesis were true. 
Metric dispersion
The information displayed within the metric dispersion section of the table is dependent on the type of metric you are analyzing. When available, you can understand the minimum, maximum, median, and the 95th percentile of your metric. The metrics dispersion allows you to measure the spread of your data, or the variability in your sample. This section also includes the absolute total contributing to the metric value. For example, if you are measuring the count of purchases per user, you can see the actual count of purchases in each treatment and the uplift between the treatments. The table below highlights which columns is available based on the type of metric you are analyzing and those which show as N/A.
Total / Average / Contributors  Mean  Stdev  Min  Median  95th Percentile  Max  

PER USER  
Count of events per user  yes  yes  yes  yes  yes  yes  yes 
Sum of event values per user  yes  yes  yes  yes  yes  yes  yes 
Average of the event values per user  N/A  yes  yes  yes  yes  yes  yes 
Ratio of two events per user  N/A  yes  yes  yes  yes  yes  yes 
Percent of unique users  yes  yes  N/A  N/A  N/A  N/A  N/A 
ACROSS USERS  
Count of events  yes  N/A  N/A  N/A  N/A  N/A  N/A 
Sum of event values  yes  N/A  N/A  N/A  N/A  N/A  N/A 
Average of event values  yes  N/A  N/A  N/A  N/A  N/A  N/A 
Ratio of two events per user  yes  N/A  N/A  N/A  N/A  N/A  N/A 
Count of unique users  yes  N/A  N/A  N/A  N/A  N/A  N/A 
Title  Description 

Mean  The mean is equal to the sum of all the data points in the data set, divided by the number of contributors in the data set. 
Stdev  The standard deviation represents the variance of the data set as compared to the mean. 
Min  The smallest data point in the data set. 
Median  The midpoint of the data set. 
Max  The largest data point in the data set. 
95th percentile  95% of the time, the metric value is at or below this value. 
Sample population
This section of the table provides information about the metric's sample population. A description of these columns are listed below:
Title  Description 

In treatment  The number of unique user keys that were served a treatment, and in some cases sent an event measured by the metric. 
Excluded  The number of unique user keys excluded from the analysis. For more information, see the Exclusions section in Attribution and exclusion. 
Sample size  The number of unique user keys remaining in the sample after exclusions. 
In most cases, the In treatment value equals the number of user keys that were served a treatment. However, there are some metric definition settings that cause the In treatment value to be less than the number of user keys that were served a treatment. (Consequently Sample size would also be less.) These metric definition settings are explained below.

For a metric measured as Average of event values, user keys that did not send the event are not included in the metric calculation. Thus, they would not be counted in the In treatment value, even though they may have been served the treatment.

For a metric measured as Ratio of two events, user keys with a zero dominator (event count) are not included in the metric calculation. Thus, these user keys would not be counted in the In treatment value for this metric, even though they may have been served the treatment.

For a metric with a Has done the following event filter (in the metric definition Advanced section), the events that are filtered out are not included in the metric calculation. Thus, a user key that is filtered out is also not counted in the In treatment value, even though the user key may have been served the treatment.
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