How ADEM Calculates Experience Score
The Experience score gives you an indication of the health of a Mobile User,
Application, or Remote Site.
| Where Can I Use
This? | What Do I Need? |
|---|
- Prisma Access (Managed by Strata Cloud Manager)
- Prisma Access (Managed by Panorama)
|
- Prisma Access license
- ADEM or Strata Cloud Manager Pro
license
- (For Browser-Based Real User Monitoring (RUM)) Prisma Access Browser license with the ADEM Browser Plugin installed
|
Autonomous Digital Experience Management (ADEM) uses
Experience Score to report application
performance so that you can gauge the experience quality of your users and take action
if the score falls below a certain level.
For both mobile users and remote sites, ADEM calculates the experience
score for an app domain using synthetic metrics collected through application tests.
For mobile users only, ADEM can also calculate the experience score
for an app domain using Browser-Based Real User Monitoring (RUM) metrics.
Synthetic Metrics Score
To calculate experience score from synthetic metrics for both mobile users and remote
sites,
ADEM uses two key metrics:
Time to First Byte
(TTFB) and
Availability.
Availability:
TTFB, composed of:
DNS Resolution Time
TCP Connect Time
SSL Connect Time
HTTP Latency
When the experience score drops below
70,
ADEM
identifies the root cause by analyzing the following segments synthetic test
scores:
ADEM calculates the synthetic metrics score every 5
minutes. If ADEM detects poor performance, it will associate a
single root cause with the application for the next 5-minute window, until the issue
is resolved.
Browser-Based RUM Metrics Score
ADEM evaluates mobile user experience with the following RUM
metrics:
Largest Contentful Paint (LCP): Measures the time taken to
render the largest visual element in the viewport.
Interaction to Next Paint (INP): Assesses interface
responsiveness by measuring how quickly the app responds to user
interactions (e.g., clicks or keypresses).
Availability:
Browser-Based RUM Experience Score Calculation
If Availability = 0: The application score is set to 0.
Otherwise, the score is the minimum of LCP Score and INP
Score.
Combined Experience Score
When both Synthetic and RUM metrics are available, the
experience score uses only RUM metrics.
When RUM metrics are unavailable, the experience score uses only
synthetic metrics.
Experience Score Calculation for Remote Sites
For remote sites, ADEM monitors paths based on
application forwarding policies configured on Prisma SD-WAN devices.
ADEM runs synthetic tests on all active and backup paths per
application and calculates the experience score per path, per application, and per
site, which rolls up from all remote sites as the organization experience score.
Remote Site Experience Score
The remote site experience score is an average of all test sample results that are
collected from individual applications monitored for that remote site.
Organization Experience Score
The organization experience score for remote sites is an average of all test sample
results that are collected from individual applications monitored on all remote
sites.
Experience Score for Each Path
For each path (active and backup path) that is discovered by ADEM based on the
application forwarding policy configured on
Prisma SD-WAN devices,
ADEM calculates the experience score using
synthetic metrics.
Application Experience Score
The application experience score per remote site is an average of test samples
collected from all active paths. For example, if an application for a remote site is
monitored on two active and two backup paths, the average of test sample results
from all active paths will be considered as the experience score for that
application monitored on that remote site.
