diff --git a/doc/INSTALL.md b/doc/INSTALL.md
index dbe770d4..1713c979 100644
--- a/doc/INSTALL.md
+++ b/doc/INSTALL.md
@@ -3,6 +3,8 @@
 Initially designed to run on a Raspberry PI, probably it can run on many other
 Linux distributions.
 
+Stimated time: 20'
+
 ### Dependencies
   | Dependency               | Comments                                                 |
   | ------------------------ | -------------------------------------------------------- |