What is App Score?
App Score is a holistic health score for an application represented as a color coded letter grade. App Score is calculated for each application and environment combination. This allows users to compare scores for the same application across all environments where it is running.
App Score represents an objective measurement and provides at-a-glance feedback of application quality and health.
How does it work?
Every hour Retrace will compute a score for all application/environments that are setup for Application Performance Monitoring (APM). The score takes into account satisfaction, performance, error and server metrics for the previous 7 days (168 hours) to generate the rating.
Much more than Apdex (Satisfaction) alone, Retrace takes advantage of additional data provided by its agent to produce a holistic rating of application quality.
The formula for the score will remain proprietary but the categories of data have been enumerated in this help document. Namely Apdex (Satisfaction), Error Metrics, and Server Metrics. At this time, the algorithm cannot be altered. The category weightings is the same for all applications and customers.
What do the grades mean?
Your application has scored very well! This is the highest rating an application can achieve. In order to be ranked this highly an app must have score well in all categories.
Your application has scored well. As the second highest rating your application is better than average but there are improvements that can be made.
Your application has scored as average. An acceptable rating but improvements can be made, likely in multiple categories.
Your application has scored poorly. This indicates that your application is experiencing poor overall health and is likely disappointing consumers.
Your application has scored very poorly. This indicates that your application is experiencing very poor performance and is probably disappointing consumers. Corrective action should be taken to determine root cause(s) and address the issue(s).
App Score cannot be calculated for this application. Since APM data is required in the scoring algorithm, this rating applies to applications that are not sending APM data.
App Score will be calculated when enough time has passed. The algorithm requires at least 24 hours of data before a score can be accurately computed. Newly discovered applications will not have enough historical data to immediately compute the score and will therefore display this icon.