diff --git a/Orchestrator/Workflows/Generate Unique Hostname/01_create_lock.js b/Orchestrator/Workflows/Generate Unique Hostname/01_create_lock.js
new file mode 100644
index 0000000..1ca2f82
--- /dev/null
+++ b/Orchestrator/Workflows/Generate Unique Hostname/01_create_lock.js	
@@ -0,0 +1,7 @@
+/*  JavaScript: create lock
+    Creates a vRO lock to avoid conflicts from multiple concurrent workflow runs.
+    Inputs: none
+    Outputs: none
+*/
+System.debug("Creating lock...");
+LockingSystem.lockAndWait("namingLock","eventBroker");
\ No newline at end of file
diff --git a/Orchestrator/Workflows/Generate Unique Hostname/02_getSdkConnectionForVC.js b/Orchestrator/Workflows/Generate Unique Hostname/02_getSdkConnectionForVC.js
new file mode 120000
index 0000000..7054a1a
--- /dev/null
+++ b/Orchestrator/Workflows/Generate Unique Hostname/02_getSdkConnectionForVC.js	
@@ -0,0 +1 @@
+Actions/com.virtuallypotato.utility/getSdkConnectionForVC.js
\ No newline at end of file
diff --git a/Orchestrator/Workflows/Generate Unique Hostname/README.md b/Orchestrator/Workflows/Generate Unique Hostname/README.md
index 2497a26..8a92857 100644
--- a/Orchestrator/Workflows/Generate Unique Hostname/README.md	
+++ b/Orchestrator/Workflows/Generate Unique Hostname/README.md	
@@ -1,6 +1,8 @@
 # Generate Unique Hostname workflow
 Ensures a unique, sequentially-numbered hostname by checking for naming conflicts in vCenter, DNS, and Active Directory.
 
+![Schema](schema.png)
+
 ## Inputs/Outputs
 | Name | Type | Direction | Description |
 |:--- |:--- |:---|:---|
@@ -10,3 +12,15 @@ Ensures a unique, sequentially-numbered hostname by checking for naming conflict
 | `vCenterName` | string | Input | FQDN of the owning vCenter |
 | `vmName` | string | Output | generated VM name |
 
+## Variables
+| Name | Type | Value | Description |
+|:--- |:--- |:--- |:--- |
+| `adHost` | AD:AdHost | `[object AD:AdHost]` | host used by the AD plugin |
+| `candidateVmName` | string | | holds the current working name during checks |
+| `computerNames` | ConfigurationElement | `[object ConfigurationElement]` | vRO config element to keep track of the last-used number sequence for a given `nameBase` |
+| `conflict` | boolean | `false` | gets set to true when a name conflict is encountered |
+| `digitCount` | number | `2` | determines how many digits get appended to `nameBase` |
+| `errMsg` | string | | thrown when errors are encountered |
+|`hostnameSequence` | number | `0` | starts the sequence at 0, tracks as it changes |
+| `vcSdkConnection` | VC:SdkConnection | | host used by the vCenter plugin (set based on `vmName` input) |
+| `vms` | Array/VC:VirtualMachine | | holds VM objects to check for conflicts |
\ No newline at end of file
diff --git a/Orchestrator/Workflows/Generate Unique Hostname/schema.png b/Orchestrator/Workflows/Generate Unique Hostname/schema.png
new file mode 100644
index 0000000..0855288
Binary files /dev/null and b/Orchestrator/Workflows/Generate Unique Hostname/schema.png differ