X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=docs%2Fcpta%2Fintroduction%2Findex.rst;h=df47dc5cd99047acd2bf57b41a5a8c5e24485a0b;hp=516e8b36e09a96f2a1184387bc04322967ca9da6;hb=0f662ea0defa9b30fa7a7d9256857fce92d20a6e;hpb=6942369b1102a8b9a3b705f9192f1ecb959382d1

diff --git a/docs/cpta/introduction/index.rst b/docs/cpta/introduction/index.rst
index 516e8b36e0..df47dc5cd9 100644
--- a/docs/cpta/introduction/index.rst
+++ b/docs/cpta/introduction/index.rst
@@ -4,33 +4,32 @@ VPP MRR Performance Dashboard
 Description
 -----------
 
-Dashboard tables list a summary of per test-case VPP MRR performance trend 
-values and detected anomalies (Maximum Receive Rate - received packet rate 
-under line rate load). Data comes from trending MRR jobs executed every 12 
-hrs (2:00, 14:00 UTC). Trend, trend compliance and anomaly calculations are 
-based on a rolling window of <N> samples, currently N=14 covering last 7 days. 
-Separate tables are generated for tested VPP worker-thread-core combinations 
-(1t1c, 2t2c, 4t4c).
+Dashboard tables list a summary of per test-case VPP MRR performance
+trend and trend compliance metrics, and detected number of anomalies.
+Data samples come from the CSIT VPP trending MRR jobs executed twice a
+day, every 12 hrs (02:00, 14:00 UTC). All trend and anomaly evaluation
+is based on a rolling window of <N=14> data samples, covering last 7
+days.
 
 Legend to table:
 
-    - "Test Case": name of CSIT test case, naming convention on
+    - **Test Case** : name of CSIT test case, naming convention in
       `CSIT wiki <https://wiki.fd.io/view/CSIT/csit-test-naming>`_.
-    - "Throughput Trend [Mpps]": last value of trend calculated over a
-      rolling window.
-    - "Trend Compliance": calculated based on detected anomalies, listed in
-       precedence order - i) "failure" if 3 consecutive outliers,
-       ii) "regression" if any regressions, iii) "progression" if any
-       progressions, iv) "normal" if data compliant with trend.
-    - "Anomaly Value [Mpps]": i) highest outlier if "failure", ii) highest
-      regression if "regression", iii) highest progression if "progression",
-      iv) "-" if normal i.e. within trend.
-    - "Change [%]": "Anomaly Value" vs. "Throughput Trend", "-" if normal.
-    - "# Outliers": number of outliers detected within a rolling window.
-
-Tables are listed in sections 1.x. Followed by daily trending graphs in
-sections 2.x. Daily trending data used to generate the graphs is listed in
-sections 3.x.
+    - **Trend [Mpps]** : last value of trend.
+    - **Short-Term Change [%]** : Relative change of last trend value vs. last
+      week trend value.
+    - **Long-Term Change [%]** : Relative change of last trend value vs. maximum
+      of trend values over the last quarter except last week.
+    - **Regressions [#]** : Number of regressions detected.
+    - **Progressions [#]** : Number of progressions detected.
+    - **Outliers [#]** : Number of outliers detected.
+
+All trend and anomaly calculations are defined in :ref:`trending_methodology`.
+
+Tested VPP worker-thread-core combinations (1t1c, 2t2c, 4t4c) are listed
+in separate tables in section 1.x. Followed by trending methodology in
+section 2. and daily trending graphs in sections 3.x. Daily trending
+data used is provided in sections 4.x.
 
 VPP worker on 1t1c
 ------------------