updated readme

README.md

diff --git a/README.md b/README.md
index ee4a58a..ba09646 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,10 @@
 * Add the license.txt file to `~/.apigee/license.txt`
 * Configure ansible to work with the correct configuration using: `export ANSIBLE_CONFIG=~/.ansible/configurations/vz-edge-1701-aio.cfg`
 * `cd ~/apigee-workspace/apigee-opdk-playbook-installation-single-region`
+* `ansible-galaxy install -r install-edge-aio-requirements.yml`
+* The first invocation should be: `ansible-playbook install-edge-aio.yml  -e @~/.apigee/credentials.yml  -e @~/.apigee/custom-properties.yml  --become --become-method=pbrun --skip-tags=root,selinux,apigee-user,iptables,ipv6 -k -vvv`
+* Subsequent invocations can save time by skipping tags that were invoked previously, you can skip re-creating the cache like this `ansible-playbook install-edge-aio.yml  -e @~/.apigee/credentials.yml  -e @~/.apigee/custom-properties.yml  --become --become-method=pbrun --skip-tags=root,selinux,apigee-user,iptables,ipv6,cache -k -vvv`
+    OR skip re-installing os pre-requisites or apigee pre-requisites like this `ansible-playbook install-edge-aio.yml  -e @~/.apigee/credentials.yml  -e @~/.apigee/custom-properties.yml  --become --become-method=pbrun --skip-tags=root,selinux,apigee-user,iptables,ipv6,cache,os-pre-req,apigee-pre-req -k -vvv`
 
 # Installing Ansible on Windows
 Please see the provided [Cygwin readme](README-CYGWIN.md) for instructions on installing Ansible on Windows.