diff --git a/README.md b/README.md
index 18a8f47590b331c3a003c35cc7996671ce96a258..728d95867b40b1e16f64563e68a7f422e78dab61 100644
--- a/README.md
+++ b/README.md
@@ -8,4 +8,9 @@ directory gspn_prodLines/ contains COSMOS .gspn files for DTMC models of product
 directory GSPN_Generator contains the generator (written in Java) for automatically creating the .gspn file, based on a configuration file.
 
 
-directory GSPN_Generator/configFiles contains a few examples of configuration files used to generate the COSMOS .gspn models 
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+directory GSPN_Generator/configFiles contains a few examples of configuration files used to generate the COSMOS .gspn models 
+
+How to generate a COSMOS .gspn from a productionLine configFile: 
+
+- javac CosmosGenerator_2phases.java
+- java CosmosGenerator_2phases configFileName (e.g. java CosmosGenerator_2phases 5M)
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