diff --git a/app/components/StructureNodeEditor.vue b/app/components/StructureNodeEditor.vue
index 1f15c9c..bd2afbb 100644
--- a/app/components/StructureNodeEditor.vue
+++ b/app/components/StructureNodeEditor.vue
@@ -138,8 +138,22 @@
             <div
               v-for="(piece, index) in node.pieces"
               :key="`piece-${index}`"
-              class="border border-base-200 rounded-md p-3 space-y-3"
+              class="relative border border-base-200 rounded-md p-3 pl-10 space-y-3 transition-colors"
+              :class="pieceReorderClass(index)"
+              @dragenter="onPieceDragEnter(index)"
+              @dragover="onPieceDragOver"
+              @drop="onPieceDrop(index)"
             >
+              <button
+                type="button"
+                class="absolute left-2 top-3 btn btn-ghost btn-xs btn-square cursor-grab active:cursor-grabbing"
+                draggable="true"
+                title="Réorganiser"
+                @dragstart="onPieceDragStart(index, $event)"
+                @dragend="onPieceDragEnd"
+              >
+                <IconLucideGripVertical class="w-4 h-4" aria-hidden="true" />
+              </button>
               <div class="flex items-start justify-between gap-2">
                 <div class="flex-1 space-y-3">
                   <div class="form-control">
@@ -195,17 +209,35 @@
             Aucun sous-composant défini.
           </p>
           <div v-else class="space-y-3">
-            <StructureNodeEditor
+            <div
               v-for="(subComponent, index) in node.subcomponents"
               :key="`sub-${index}`"
-              :node="subComponent"
-              :depth="depth + 1"
-              :component-types="componentTypes"
-              :piece-types="pieceTypes"
-              :allow-subcomponents="childAllowSubcomponents"
-              :max-subcomponent-depth="maxSubcomponentDepth"
-              @remove="removeSubComponent(index)"
-            />
+              class="relative pl-8 transition-shadow rounded-lg"
+              :class="subcomponentReorderClass(index)"
+              @dragenter="onSubcomponentDragEnter(index)"
+              @dragover="onSubcomponentDragOver"
+              @drop="onSubcomponentDrop(index)"
+            >
+              <button
+                type="button"
+                class="absolute left-0 top-4 btn btn-ghost btn-xs btn-square cursor-grab active:cursor-grabbing"
+                draggable="true"
+                title="Réorganiser"
+                @dragstart="onSubcomponentDragStart(index, $event)"
+                @dragend="onSubcomponentDragEnd"
+              >
+                <IconLucideGripVertical class="w-4 h-4" aria-hidden="true" />
+              </button>
+              <StructureNodeEditor
+                :node="subComponent"
+                :depth="depth + 1"
+                :component-types="componentTypes"
+                :piece-types="pieceTypes"
+                :allow-subcomponents="childAllowSubcomponents"
+                :max-subcomponent-depth="maxSubcomponentDepth"
+                @remove="removeSubComponent(index)"
+              />
+            </div>
           </div>
         </section>
       </div>
@@ -214,9 +246,10 @@
 </template>
 
 <script setup lang="ts">
-import { computed, watch } from 'vue'
+import { computed, ref, watch } from 'vue'
 import IconLucidePlus from '~icons/lucide/plus'
 import IconLucideTrash from '~icons/lucide/trash'
+import IconLucideGripVertical from '~icons/lucide/grip-vertical'
 import type { ComponentModelPiece, ComponentModelStructureNode } from '~/shared/types/inventory'
 
 defineOptions({ name: 'StructureNodeEditor' })
@@ -525,6 +558,138 @@ const removeSubComponent = (index: number) => {
   props.node.subcomponents.splice(index, 1)
 }
 
+const draggingPieceIndex = ref<number | null>(null)
+const pieceDropTargetIndex = ref<number | null>(null)
+const draggingSubcomponentIndex = ref<number | null>(null)
+const subcomponentDropTargetIndex = ref<number | null>(null)
+
+const moveItemInPlace = <T,>(list: T[], from: number, to: number) => {
+  if (from === to) {
+    return
+  }
+  if (from < 0 || to < 0 || from >= list.length || to >= list.length) {
+    return
+  }
+  const updated = list.slice()
+  const [item] = updated.splice(from, 1)
+  updated.splice(to, 0, item)
+  list.splice(0, list.length, ...updated)
+}
+
+const resetPieceDragState = () => {
+  draggingPieceIndex.value = null
+  pieceDropTargetIndex.value = null
+}
+
+const onPieceDragStart = (index: number, event: DragEvent) => {
+  draggingPieceIndex.value = index
+  pieceDropTargetIndex.value = index
+  if (event.dataTransfer) {
+    event.dataTransfer.effectAllowed = 'move'
+  }
+}
+
+const onPieceDragEnter = (index: number) => {
+  if (draggingPieceIndex.value === null) {
+    return
+  }
+  pieceDropTargetIndex.value = index
+}
+
+const onPieceDragOver = (event: DragEvent) => {
+  event.preventDefault()
+}
+
+const onPieceDrop = (index: number) => {
+  if (!Array.isArray(props.node.pieces)) {
+    resetPieceDragState()
+    return
+  }
+  const from = draggingPieceIndex.value
+  const to = index
+  if (from === null || to === null) {
+    resetPieceDragState()
+    return
+  }
+  moveItemInPlace(props.node.pieces, from, to)
+  resetPieceDragState()
+}
+
+const onPieceDragEnd = () => {
+  resetPieceDragState()
+}
+
+const pieceReorderClass = (index: number) => {
+  if (draggingPieceIndex.value === index) {
+    return 'border-dashed border-primary'
+  }
+  if (
+    draggingPieceIndex.value !== null &&
+    pieceDropTargetIndex.value === index &&
+    draggingPieceIndex.value !== index
+  ) {
+    return 'border-primary border-dashed bg-primary/5'
+  }
+  return ''
+}
+
+const resetSubcomponentDragState = () => {
+  draggingSubcomponentIndex.value = null
+  subcomponentDropTargetIndex.value = null
+}
+
+const onSubcomponentDragStart = (index: number, event: DragEvent) => {
+  draggingSubcomponentIndex.value = index
+  subcomponentDropTargetIndex.value = index
+  if (event.dataTransfer) {
+    event.dataTransfer.effectAllowed = 'move'
+  }
+}
+
+const onSubcomponentDragEnter = (index: number) => {
+  if (draggingSubcomponentIndex.value === null) {
+    return
+  }
+  subcomponentDropTargetIndex.value = index
+}
+
+const onSubcomponentDragOver = (event: DragEvent) => {
+  event.preventDefault()
+}
+
+const onSubcomponentDrop = (index: number) => {
+  if (!Array.isArray(props.node.subcomponents)) {
+    resetSubcomponentDragState()
+    return
+  }
+  const from = draggingSubcomponentIndex.value
+  const to = index
+  if (from === null || to === null) {
+    resetSubcomponentDragState()
+    return
+  }
+  moveItemInPlace(props.node.subcomponents, from, to)
+  resetSubcomponentDragState()
+}
+
+const onSubcomponentDragEnd = () => {
+  resetSubcomponentDragState()
+}
+
+const subcomponentReorderClass = (index: number) => {
+  if (draggingSubcomponentIndex.value === index) {
+    return 'ring-2 ring-primary'
+  }
+  if (
+    draggingSubcomponentIndex.value !== null &&
+    subcomponentDropTargetIndex.value === index &&
+    draggingSubcomponentIndex.value !== index
+  ) {
+    return 'ring-2 ring-primary/70'
+  }
+  return ''
+}
+
 watch(
   canManageSubcomponents,
   (allowed) => {
diff --git a/app/components/common/RequirementListEditor.vue b/app/components/common/RequirementListEditor.vue
index 792e8bb..1764d63 100644
--- a/app/components/common/RequirementListEditor.vue
+++ b/app/components/common/RequirementListEditor.vue
@@ -20,8 +20,22 @@
       <div
         v-for="(requirement, index) in requirements"
         :key="requirement.id || index"
-        class="border border-base-200 rounded-lg p-4 space-y-3"
+        class="relative border border-base-200 rounded-lg p-4 pl-12 space-y-3 transition-colors"
+        :class="requirementReorderClass(index)"
+        @dragenter="onRequirementDragEnter(index)"
+        @dragover="onRequirementDragOver"
+        @drop="onRequirementDrop(index)"
       >
+        <button
+          type="button"
+          class="absolute left-3 top-4 btn btn-ghost btn-xs btn-square cursor-grab active:cursor-grabbing"
+          draggable="true"
+          title="Réorganiser"
+          @dragstart="onRequirementDragStart(index, $event)"
+          @dragend="onRequirementDragEnd"
+        >
+          <IconLucideGripVertical class="w-4 h-4" aria-hidden="true" />
+        </button>
         <div class="flex items-start justify-between gap-3">
           <div class="grid grid-cols-1 md:grid-cols-2 gap-3 flex-1">
             <div class="form-control">
@@ -120,11 +134,12 @@
 </template>
 
 <script setup lang="ts">
-import { computed } from 'vue'
+import { computed, ref } from 'vue'
 import type { PropType } from 'vue'
 import IconLucidePlus from '~icons/lucide/plus'
 import IconLucideTrash2 from '~icons/lucide/trash-2'
 import SearchSelect from '~/components/common/SearchSelect.vue'
+import IconLucideGripVertical from '~icons/lucide/grip-vertical'
 
 type Option = {
   id: string | number
@@ -139,6 +154,7 @@ type Requirement = Record<string, unknown> & {
   maxCount?: number | null
   required?: boolean | null
   allowNewModels?: boolean | null
+  orderIndex?: number | null
 }
 
 type Labels = {
@@ -221,20 +237,30 @@ const optionDescription = (option: Option) => {
   return ''
 }
 
+const applyOrderIndex = (list: Requirement[]): Requirement[] =>
+  list.map((item, index) => ({
+    ...item,
+    orderIndex: index,
+  }))
+
 const addRequirement = () => {
-  requirements.value = [
+  requirements.value = applyOrderIndex([
     ...requirements.value,
     props.defaultRequirement(),
-  ]
+  ])
 }
 
 const removeRequirement = (index: number) => {
-  requirements.value = requirements.value.filter((_, i) => i !== index)
+  requirements.value = applyOrderIndex(
+    requirements.value.filter((_, i) => i !== index),
+  )
 }
 
 const updateRequirement = (index: number, patch: Partial<Requirement>) => {
-  requirements.value = requirements.value.map((item, i) =>
-    i === index ? { ...item, ...patch } : item
+  requirements.value = applyOrderIndex(
+    requirements.value.map((item, i) =>
+      i === index ? { ...item, ...patch } : item,
+    ),
   )
 }
 
@@ -251,6 +277,76 @@ const parseOptionalNumber = (value: string) => {
   return Number.isFinite(parsed) ? parsed : null
 }
 
+const draggingRequirementIndex = ref<number | null>(null)
+const requirementDropTargetIndex = ref<number | null>(null)
+
+const resetRequirementDragState = () => {
+  draggingRequirementIndex.value = null
+  requirementDropTargetIndex.value = null
+}
+
+const reorderRequirements = (from: number, to: number) => {
+  const list = requirements.value
+  if (!Array.isArray(list)) {
+    resetRequirementDragState()
+    return
+  }
+  if (from === to || from < 0 || to < 0 || from >= list.length || to >= list.length) {
+    resetRequirementDragState()
+    return
+  }
+  const updated = list.slice() as Requirement[]
+  const [moved] = updated.splice(from, 1)
+  updated.splice(to, 0, moved)
+  requirements.value = applyOrderIndex(updated)
+  resetRequirementDragState()
+}
+
+const onRequirementDragStart = (index: number, event: DragEvent) => {
+  draggingRequirementIndex.value = index
+  requirementDropTargetIndex.value = index
+  if (event.dataTransfer) {
+    event.dataTransfer.effectAllowed = 'move'
+  }
+}
+
+const onRequirementDragEnter = (index: number) => {
+  if (draggingRequirementIndex.value === null) {
+    return
+  }
+  requirementDropTargetIndex.value = index
+}
+
+const onRequirementDragOver = (event: DragEvent) => {
+  event.preventDefault()
+}
+
+const onRequirementDrop = (index: number) => {
+  if (draggingRequirementIndex.value === null) {
+    resetRequirementDragState()
+    return
+  }
+  reorderRequirements(draggingRequirementIndex.value, index)
+}
+
+const onRequirementDragEnd = () => {
+  resetRequirementDragState()
+}
+
+const requirementReorderClass = (index: number) => {
+  if (draggingRequirementIndex.value === index) {
+    return 'border-dashed border-primary'
+  }
+  if (
+    draggingRequirementIndex.value !== null &&
+    requirementDropTargetIndex.value === index &&
+    draggingRequirementIndex.value !== index
+  ) {
+    return 'border-primary border-dashed bg-primary/5'
+  }
+  return ''
+}
+
 const normalizeTypeModel = (value: unknown) => {
   if (value === null || value === undefined) {
     return ''
diff --git a/app/pages/machine-skeleton/new.vue b/app/pages/machine-skeleton/new.vue
index 1bea69b..49dc61b 100644
--- a/app/pages/machine-skeleton/new.vue
+++ b/app/pages/machine-skeleton/new.vue
@@ -157,26 +157,32 @@ const toIntegerOrNull = (value, fallback = null) => {
 const normalizeComponentRequirements = (requirements = []) =>
   requirements
     .filter(req => req?.typeComposantId)
-    .map(req => ({
+    .map((req, index) => ({
       typeComposantId: req.typeComposantId,
       label: req.label?.trim() ? req.label.trim() : undefined,
       minCount: toIntegerOrNull(req.minCount, 1),
       maxCount: toIntegerOrNull(req.maxCount, null),
       required: req.required ?? true,
-      allowNewModels: req.allowNewModels ?? true
+      allowNewModels: req.allowNewModels ?? true,
+      orderIndex: typeof req.orderIndex === 'number' ? req.orderIndex : index
     }))
+    .sort((a, b) => (a.orderIndex ?? 0) - (b.orderIndex ?? 0))
+    .map((req, index) => ({ ...req, orderIndex: index }))
 
 const normalizePieceRequirements = (requirements = []) =>
   requirements
     .filter(req => req?.typePieceId)
-    .map(req => ({
+    .map((req, index) => ({
       typePieceId: req.typePieceId,
       label: req.label?.trim() ? req.label.trim() : undefined,
       minCount: toIntegerOrNull(req.minCount, 0),
       maxCount: toIntegerOrNull(req.maxCount, null),
       required: req.required ?? false,
-      allowNewModels: req.allowNewModels ?? true
+      allowNewModels: req.allowNewModels ?? true,
+      orderIndex: typeof req.orderIndex === 'number' ? req.orderIndex : index
     }))
+    .sort((a, b) => (a.orderIndex ?? 0) - (b.orderIndex ?? 0))
+    .map((req, index) => ({ ...req, orderIndex: index }))
 
 const buildPayload = typeData => ({
   name: typeData.name,
diff --git a/app/pages/type/edit/[id].vue b/app/pages/type/edit/[id].vue
index babac96..15cc7f4 100644
--- a/app/pages/type/edit/[id].vue
+++ b/app/pages/type/edit/[id].vue
@@ -110,26 +110,32 @@ const toIntegerOrNull = (value, fallback = null) => {
 const normalizeComponentRequirements = (requirements = []) =>
   requirements
     .filter(req => req?.typeComposantId)
-    .map(req => ({
+    .map((req, index) => ({
       typeComposantId: req.typeComposantId,
       label: req.label?.trim() ? req.label.trim() : undefined,
       minCount: toIntegerOrNull(req.minCount, 1),
       maxCount: toIntegerOrNull(req.maxCount, null),
       required: req.required ?? true,
-      allowNewModels: req.allowNewModels ?? true
+      allowNewModels: req.allowNewModels ?? true,
+      orderIndex: typeof req.orderIndex === 'number' ? req.orderIndex : index
     }))
+    .sort((a, b) => (a.orderIndex ?? 0) - (b.orderIndex ?? 0))
+    .map((req, index) => ({ ...req, orderIndex: index }))
 
 const normalizePieceRequirements = (requirements = []) =>
   requirements
     .filter(req => req?.typePieceId)
-    .map(req => ({
+    .map((req, index) => ({
       typePieceId: req.typePieceId,
       label: req.label?.trim() ? req.label.trim() : undefined,
       minCount: toIntegerOrNull(req.minCount, 0),
       maxCount: toIntegerOrNull(req.maxCount, null),
       required: req.required ?? false,
-      allowNewModels: req.allowNewModels ?? true
+      allowNewModels: req.allowNewModels ?? true,
+      orderIndex: typeof req.orderIndex === 'number' ? req.orderIndex : index
     }))
+    .sort((a, b) => (a.orderIndex ?? 0) - (b.orderIndex ?? 0))
+    .map((req, index) => ({ ...req, orderIndex: index }))
 
 const saveChanges = async () => {
   try {