diff --git a/1-intro-to-smart-infra.md b/1-intro-to-smart-infra.md
index ff23adb..c8f90ec 100644
--- a/1-intro-to-smart-infra.md
+++ b/1-intro-to-smart-infra.md
@@ -12,6 +12,11 @@
 1. Analytics approach: How can I use data to answer Q1?
     - Using data, only 2% of trips are done cycling, why? Try to learn causes by
       the data
+    - Types of analytics:
+        - Descriptive: what happened
+        - diagnostic: Why
+        - Predictive: What will happen
+        - Prescritive: How to make it happen
 1. Data requirements: What Existing Do I need to analyze the problem
     - Cyclists’ casualties data
     - City data