diff --git a/wiki/planning/businesscases/dataconsistency.md b/wiki/planning/businesscases/dataconsistency.md
index 37f18b8a797..b39088417c3 100644
--- a/wiki/planning/businesscases/dataconsistency.md
+++ b/wiki/planning/businesscases/dataconsistency.md
@@ -1 +1,66 @@
-# Data Consistency
\ No newline at end of file
+# Data Consistency
+
+## Live-Delay Analysis
+* GPS per competitor
+* wind for advantage line
+
+## Outlier detection
+* GPS tracks
+* Wind
+
+## Dropout interpolation
+* GPS tracks
+* Wind
+
+## Connection loss
+* GPS Track:
+  * introduce states "no data" / "no connection"
+    * has to be based on transmission rates
+    * no ping available
+* Wind
+
+## Data quality measures
+* Start Phase
+  * correctness of start time on start boat
+  * stabilize start detection algorithms / heuristic
+* Completeness of Leg
+  * mark tracks & passings
+  * gps fixes
+  * wind measurements
+  * leg type detection
+* Completeness of Race
+  * competitor tracks: gps, mark passings
+  * mark tracks: validation (compare marks & competitor tracks); recalculation of mark passings
+  * all competitor or topN competitors
+  * all marks or future (remaining) marks
+  * take into account #{common legs} of competitors in aggregate calculation
+* Completeness of Regatta
+  * (all races complete) only in rare cases achievable
+  * cleansing of races, if possible
+  * include race states, e.g. DNF, into aggregate calculations, e.g. average speed
+  * take into account #{common races} of competitors in aggregate calculation
+* Robustness of Aggergate Calculations
+  * on all levels: leg, race, regatta, regatta series
+  * aggregate calculation can be corrupted by filtered outliers, lost connection
+* Quality based on Outliers and/or Dropouts
+  * GPS
+  * Wind
+* Network Connectivity
+  * all required channels
+
+## Master Data
+* Competitors: names
+* Sail numbers
+* Boat classes: names
+* Scoring schemes: score corrections
+
+## Data Properties to be visualized or accessible
+* Sampling frequency for GPS
+* Number of active GPS satellites
+* Reflect accuracies of measurements somehow on the UI, e.g. tails along GPS tracks
+
+## Extra-/Interpolation of GPS tracks
+* bridge phase without connection to network or connection to GPS satellites
+
+## Extra-/Interpolation for wind
+* bridge phases without estimation or measurement