diff --git a/documentation/yocto-project-qs/yocto-project-qs.xml b/documentation/yocto-project-qs/yocto-project-qs.xml
index 65728fb42f..bc40cbbeb3 100644
--- a/documentation/yocto-project-qs/yocto-project-qs.xml
+++ b/documentation/yocto-project-qs/yocto-project-qs.xml
@@ -288,8 +288,10 @@
          <para>
              Take some time to examine your <filename>conf/local.conf</filename> file.  
              The defaults should work fine.  
-             However, if you have a multi-core CPU you might want to set the variables
-             BB_NUMBER_THREADS and PARALLEL_MAKE to the number of processor cores on your build machine.
+             However, if you have a multi-core CPU you might want to set the variable
+             BB_NUMBER_THREADS equal to twice the number of processor cores your system has.
+             And, set the variable PARALLEL_MAKE equal to the number of processor cores.
+             Setting these variables can significantly shorten your build time.
              By default, these variables are commented out.
          </para>
          <para>