diff --git a/doc/FAQ b/doc/FAQ
index 676dcae80c6491c079197a63d6e557d37eeabf12..bf5589d977ab7a0b44644e22493508ce4872e546 100644
--- a/doc/FAQ
+++ b/doc/FAQ
@@ -1,4 +1,4 @@
-$Id: FAQ,v 1.61 2005-05-13 05:09:08 geuzaine Exp $
+$Id: FAQ,v 1.62 2005-06-04 03:28:31 geuzaine Exp $
 
 This is the Gmsh FAQ
 
@@ -283,6 +283,17 @@ fields. There is also one additional clipping plane available for
 "cutting" only the mesh (by keeping entire elements), in
 'Tools->Options->Mesh->Cut Plane'.
 
+* 5.14 What is the signification of rho, eta and gamma metrics in
+Tools->Statistics?
+
+They measure the quality of the tetrahedra in a mesh:
+
+rho ~ min_edge_length / max_edge_length
+eta ~ volume^(2/3) / sum_edge_length2
+gamma ~ volume / sum_face_area / max_edge_length 
+
+For the exact definitions, look at Mesh/Simplex.cpp.
+
 ********************************************************************
 
 Section 6: Solver module