diff --git a/schemas/ispyb/updates/2025_03_20_ParticleClassification_angularEfficiency_suggestedTilt.sql b/schemas/ispyb/updates/2025_03_20_ParticleClassification_angularEfficiency_suggestedTilt.sql
new file mode 100644
index 0000000..565eb7b
--- /dev/null
+++ b/schemas/ispyb/updates/2025_03_20_ParticleClassification_angularEfficiency_suggestedTilt.sql
@@ -0,0 +1,6 @@
+INSERT IGNORE INTO SchemaStatus (scriptName, schemaStatus) VALUES ('2025_03_20_ParticleClassification_angularEfficiency_suggestedTilt.sql', 'ONGOING');
+
+ALTER TABLE ParticleClassification ADD angularEfficiency double COMMENT 'Variation in resolution across different angles, 1-2sig/mean', ALGORITHM=INSTANT;
+ALTER TABLE ParticleClassification ADD suggestedTilt double COMMENT 'Suggested stage tilt angle to improve angular efficiency. Unit: degrees', ALGORITHM=INSTANT;
+
+UPDATE SchemaStatus SET schemaStatus = 'DONE' WHERE scriptName = '2025_03_20_ParticleClassification_angularEfficiency_suggestedTilt.sql';