diff --git a/src/main/java/de/hsel/spm/baudas/analysis/Analysis.java b/src/main/java/de/hsel/spm/baudas/analysis/Analysis.java
index b8bc054..3f8f86a 100644
--- a/src/main/java/de/hsel/spm/baudas/analysis/Analysis.java
+++ b/src/main/java/de/hsel/spm/baudas/analysis/Analysis.java
@@ -8,7 +8,7 @@ import java.io.File;
 import java.io.IOException;
 
 /**
- * base interface for analysis
+ * base interface for analysis.
  *
  * @author Johannes Theiner
  * @version 0.1
@@ -19,7 +19,7 @@ public interface Analysis<T> {
 
 
     /**
-     * loads data from csv file
+     * loads data from csv file.
      *
      * @param file File to analyze
      * @return loaded data in weka format
@@ -37,7 +37,7 @@ public interface Analysis<T> {
     }
 
     /**
-     * result of the analysis
+     * result of the analysis.
      *
      * @return result as T
      */
diff --git a/src/main/java/de/hsel/spm/baudas/analysis/ShoppingTimes.java b/src/main/java/de/hsel/spm/baudas/analysis/ShoppingTimes.java
index 3a97155..b904cb4 100644
--- a/src/main/java/de/hsel/spm/baudas/analysis/ShoppingTimes.java
+++ b/src/main/java/de/hsel/spm/baudas/analysis/ShoppingTimes.java
@@ -11,6 +11,8 @@ import java.util.HashMap;
 import java.util.Map;
 
 /**
+ * Shopping Times Analysis.
+ *
  * @author Johannes Theiner
  * @version 0.1
  * @since 0.1
@@ -25,6 +27,11 @@ public class ShoppingTimes implements Analysis<Map<DayHour, Integer>> {
     }
 
 
+    /**
+     * get customer count at specific times.
+     *
+     * @return Map of Day-Hour Combinations and the corresponding customer count
+     */
     @Override
     public Map<DayHour, Integer> getResult() {
         if (result == null) {
@@ -34,6 +41,7 @@ public class ShoppingTimes implements Analysis<Map<DayHour, Integer>> {
             int hourIndex = 1;
 
             try {
+                //Remove all other attributes
                 Remove remove = new Remove();
                 remove.setAttributeIndicesArray(keepIndexes);
                 remove.setInvertSelection(true);
@@ -43,14 +51,22 @@ public class ShoppingTimes implements Analysis<Map<DayHour, Integer>> {
                 ex.printStackTrace();
             }
 
+            /*
+            remove all days except one and get the stats
+            needed because weka has no other way to combine attributes
+             */
             for (int i = 0; i < instances.attribute(dayIndex).numValues(); i++) {
                 String day = instances.attribute(dayIndex).value(i);
                 Instances instancesCopy = new Instances(instances, 0, instances.numInstances());
+
+
                 for (int j = instancesCopy.numInstances() - 1; j >= 0; j--) {
                     Instance instance = instancesCopy.get(j);
                     if(!instance.stringValue(dayIndex).equals(day))
                         instancesCopy.delete(j);
                 }
+
+                //get customer count and put into map
                 AttributeStats stats = instancesCopy.attributeStats(hourIndex);
                 for (int j = 0; j < instancesCopy.attribute(hourIndex).numValues(); j++) {
                     DayHour dayHour = new DayHour(day, instancesCopy.attribute(hourIndex).value(j));
diff --git a/src/test/java/de/hsel/spm/baudas/analysis/ShoppingTimesTest.java b/src/test/java/de/hsel/spm/baudas/analysis/ShoppingTimesTest.java
index 14fad53..b5651cc 100644
--- a/src/test/java/de/hsel/spm/baudas/analysis/ShoppingTimesTest.java
+++ b/src/test/java/de/hsel/spm/baudas/analysis/ShoppingTimesTest.java
@@ -12,7 +12,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTimeout;
 
 /**
- * @author Johannes Theiner
+ * @author hier Namen eintragen
  * @version 0.1
  * @since 0.1
  **/
@@ -28,7 +28,7 @@ public class ShoppingTimesTest {
 
         AtomicReference<Map<DayHour, Integer>> results = new AtomicReference<>();
 
-        assertTimeout(Duration.ofMillis(1300), () -> results.set(overview.getResult()));
+        assertTimeout(Duration.ofMillis(1700), () -> results.set(overview.getResult()));
 
         assertEquals(4, results.get().get(new DayHour("Montag", "10-12 Uhr")));
         //TODO: mehr Tests