diff --git a/decision_rule_generation/tests/data/sample_grid_results.csv b/decision_rule_generation/tests/data/sample_grid_results.csv
new file mode 100644
index 0000000..f0b9fff
--- /dev/null
+++ b/decision_rule_generation/tests/data/sample_grid_results.csv
@@ -0,0 +1,7 @@
+phase,grace_minutes,delay_seconds,coverage_percent,unknown_rate_percent,worst_case_delay
+pinned,5,30,92.5,2.0,45.0
+pinned,10,60,95.0,1.5,70.0
+pinned,15,90,96.0,1.0,120.0
+unpinned,5,30,88.0,3.0,40.0
+unpinned,10,60,91.0,2.5,65.0
+unpinned,15,90,94.0,2.0,110.0
\ No newline at end of file