diff --git a/_quarto.yml b/_quarto.yml
index b2f334b..6c5cbee 100644
--- a/_quarto.yml
+++ b/_quarto.yml
@@ -86,9 +86,10 @@ book:
     - begin/cdis.md
     - begin/security.md
 
-  # - part: Project Design (Basic)
-  #   chapters:
+  - part: Project Design (Basic)
+    chapters:
   #   - designbas/vocab.md
+    - designbas/variable.md
 
   - part: Project Design (Advanced)
     chapters:
diff --git a/check/testing2.md b/check/testing2.md
index 0857cd3..5406265 100644
--- a/check/testing2.md
+++ b/check/testing2.md
@@ -5,6 +5,7 @@ author:
   - name: Lise DeShea
     affiliation: University of Oklahoma Health Sciences
     affiliation-url: https://ouhsc.edu/bbmc/
+    email: lise-deshea@ouhsc.edu
     orcid: 0000-0003-3232-5216
     attributes:
       corresponding: true
diff --git a/designbas/variable.md b/designbas/variable.md
new file mode 100644
index 0000000..9cd8307
--- /dev/null
+++ b/designbas/variable.md
@@ -0,0 +1,32 @@
+---
+abstract: Design variables to increase data quality and fidelity.
+
+author:
+  - name: Lise DeShea
+    affiliation: University of Oklahoma Health Sciences
+    affiliation-url: https://ouhsc.edu/bbmc/
+    email: lise-deshea@ouhsc.edu
+    orcid: 0000-0003-3232-5216
+    attributes:
+      corresponding: true
+  - name: Thomas Wilson
+    affiliation: University of Oklahoma Health Sciences
+    affiliation-url: https://ouhsc.edu/bbmc/
+    email: thomas-wilson@ouhsc.edu
+    orcid: 0009-0009-1239-1348
+
+
+csl: ../assets/csl/apa-7e.csl
+---
+
+# Variable Decisions {#sec-designbas-variable}
+
+**Chapter Leads**: Lise DeShea, Thomas Wilson
+
+::: {.callout-note appearance="simple"}
+
+## Additional Chapter Details
+
+This chapter was started in October 2024.
+If you have suggested modifications or additions, please see [How to Contribute](../index.qmd#sec-welcome-contribute) on the book's welcome page.
+:::