diff --git a/build.gradle b/build.gradle
index e4bf242e1..bbf86de3d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -16,7 +16,7 @@ tasks.withType(JavaCompile).configureEach {
 
 allprojects {
     group = 'fr.insee.eno'
-    version = '3.15.3'
+    version = '3.15.4'
 }
 
 subprojects {
diff --git a/eno-ws/src/main/java/fr/insee/eno/ws/controller/GenerationStandardController.java b/eno-ws/src/main/java/fr/insee/eno/ws/controller/GenerationStandardController.java
index 0b813022e..f8d6d3d3e 100644
--- a/eno-ws/src/main/java/fr/insee/eno/ws/controller/GenerationStandardController.java
+++ b/eno-ws/src/main/java/fr/insee/eno/ws/controller/GenerationStandardController.java
@@ -10,6 +10,7 @@
 import fr.insee.eno.treatments.LunaticPostProcessing;
 import fr.insee.eno.ws.PassThrough;
 import fr.insee.eno.ws.controller.utils.ReactiveControllerUtils;
+import fr.insee.eno.ws.exception.MultiModelException;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.media.Schema;
@@ -76,7 +77,8 @@ public Mono<ResponseEntity<String>> generateLunatic(
                     "Generation of a Xforms questionnaire (for business web surveys) from the given DDI with " +
                     "standard parameters, in function of context. " +
                     "An metadata `xml` file can be added and is required is the context is 'BUSINESS'. " +
-                    "An optional specific treatment `xsl` file can be added.")
+                    "An optional specific treatment `xsl` file can be added. " +
+                    "If the multi-model option is set to true, the output questionnaire(s) are put in a zip file.")
     @PostMapping(value = "{context}/xforms",
             produces = MediaType.APPLICATION_OCTET_STREAM_VALUE, consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
     public Mono<Void> generateXforms(
@@ -84,9 +86,12 @@ public Mono<Void> generateXforms(
             @RequestPart(value="metadata", required = false) Mono<FilePart> metadata,
             @RequestPart(value="specificTreatment", required=false) Mono<FilePart> specificTreatment,
             @PathVariable Context context,
+            @RequestParam(value="multi-model", required=false, defaultValue="false") boolean multiModel,
             ServerHttpRequest request, ServerHttpResponse response) {
         if (Context.HOUSEHOLD.equals(context))
             return Mono.error(new ContextException("Xforms format is not compatible with 'HOUSEHOLD' context."));
+        if (Context.BUSINESS.equals(context) && (! multiModel))
+            return Mono.error(new MultiModelException("Multi-model option must be 'true' in 'BUSINESS' context."));
         metadata.hasElement()
                 .flatMap(hasElementValue -> {
                     if (Context.BUSINESS.equals(context) && Boolean.FALSE.equals(hasElementValue))
@@ -104,7 +109,8 @@ public Mono<Void> generateXforms(
                     "parameters, in function of context. Custom values can be passed for format of columns and " +
                     "capture mode. " +
                     "An metadata `xml` file can be added and is required is the context is 'BUSINESS'. " +
-                    "An optional specific treatment `xsl` file can be added." )
+                    "An optional specific treatment `xsl` file can be added. " +
+                    "If the multi-model option is set to true, the output questionnaire(s) are put in a zip file." )
     @PostMapping(value = "{context}/fo",
             produces = MediaType.APPLICATION_OCTET_STREAM_VALUE, consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
     public Mono<Void> generateFO(
@@ -114,7 +120,10 @@ public Mono<Void> generateFO(
             @RequestParam(value="Format-column", required=false) Integer nbColumn,
             @RequestParam(value="Capture", required=false) CaptureEnum capture,
             @PathVariable Context context,
+            @RequestParam(value="multi-model", required=false, defaultValue="false") boolean multiModel,
             ServerHttpRequest request, ServerHttpResponse response) {
+        if (Context.BUSINESS.equals(context) && (! multiModel))
+            return Mono.error(new MultiModelException("Multi-model option must be 'true' in 'BUSINESS' context."));
         metadata.hasElement()
                 .flatMap(hasElementValue -> {
                     if (Context.BUSINESS.equals(context) && Boolean.FALSE.equals(hasElementValue))
diff --git a/eno-ws/src/main/java/fr/insee/eno/ws/controller/exception/EnoExceptionController.java b/eno-ws/src/main/java/fr/insee/eno/ws/controller/exception/EnoExceptionController.java
index d3917b92d..65219c10d 100644
--- a/eno-ws/src/main/java/fr/insee/eno/ws/controller/exception/EnoExceptionController.java
+++ b/eno-ws/src/main/java/fr/insee/eno/ws/controller/exception/EnoExceptionController.java
@@ -8,6 +8,7 @@
 import fr.insee.eno.legacy.exception.EnoLegacyParametersException;
 import fr.insee.eno.treatments.exceptions.SpecificTreatmentsDeserializationException;
 import fr.insee.eno.treatments.exceptions.SpecificTreatmentsValidationException;
+import fr.insee.eno.ws.exception.MultiModelException;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -44,6 +45,11 @@ public ResponseEntity<Object> exception(MetadataFileException exception) {
 		return new ResponseEntity<>("Metadata file error: "+exception.getMessage(), HttpStatus.BAD_REQUEST);
 	}
 
+	@ExceptionHandler(value = MultiModelException.class)
+	public ResponseEntity<Object> exception(MultiModelException exception) {
+		return new ResponseEntity<>("Multi-model option error: "+exception.getMessage(), HttpStatus.BAD_REQUEST);
+	}
+
 	@ExceptionHandler(value = EnoGenerationException.class)
 	public ResponseEntity<Object> exception(EnoGenerationException exception) {
 		return new ResponseEntity<>("EnoGeneration error : "+exception.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
diff --git a/eno-ws/src/main/java/fr/insee/eno/ws/exception/MultiModelException.java b/eno-ws/src/main/java/fr/insee/eno/ws/exception/MultiModelException.java
new file mode 100644
index 000000000..df6cdb5c3
--- /dev/null
+++ b/eno-ws/src/main/java/fr/insee/eno/ws/exception/MultiModelException.java
@@ -0,0 +1,9 @@
+package fr.insee.eno.ws.exception;
+
+public class MultiModelException extends Exception {
+
+    public MultiModelException(String message) {
+        super(message);
+    }
+
+}