diff --git a/src/command/unit/inspection/inspectionPlanCommand.ts b/src/command/unit/inspection/inspectionPlanCommand.ts
index 0daac13..58593ae 100644
--- a/src/command/unit/inspection/inspectionPlanCommand.ts
+++ b/src/command/unit/inspection/inspectionPlanCommand.ts
@@ -5,7 +5,7 @@ export interface CreateInspectionPlanCommand {
   inspectionInterval: PlanTimeDefinition;
   remindTime: PlanTimeDefinition;
   relatedId: string;
-  assigned: "vehicle" | "equipment";
+  assigned: "vehicle" | "equipment" | "wearable";
 }
 
 export interface UpdateInspectionPlanCommand {
diff --git a/src/command/unit/inspection/inspectionPlanCommandHandler.ts b/src/command/unit/inspection/inspectionPlanCommandHandler.ts
index 179f8a7..e140f64 100644
--- a/src/command/unit/inspection/inspectionPlanCommandHandler.ts
+++ b/src/command/unit/inspection/inspectionPlanCommandHandler.ts
@@ -24,6 +24,7 @@ export default abstract class InspectionPlanCommandHandler {
         remindTime: createInspectionPlan.remindTime,
         equipmentTypeId: createInspectionPlan.assigned == "equipment" ? createInspectionPlan.relatedId : null,
         vehicleTypeId: createInspectionPlan.assigned == "vehicle" ? createInspectionPlan.relatedId : null,
+        wearableTypeId: createInspectionPlan.assigned == "wearable" ? createInspectionPlan.relatedId : null,
       })
       .execute()
       .then((result) => {
diff --git a/src/controller/admin/unit/inspectionController.ts b/src/controller/admin/unit/inspectionController.ts
index 7307820..211ea10 100644
--- a/src/controller/admin/unit/inspectionController.ts
+++ b/src/controller/admin/unit/inspectionController.ts
@@ -18,6 +18,7 @@ import { PdfExport } from "../../../helpers/pdfExport";
 import { PDFDocument } from "pdf-lib";
 import sharp from "sharp";
 import InspectionPointResultService from "../../../service/unit/inspection/inspectionPointResultService";
+import InspectionPlanService from "../../../service/unit/inspection/inspectionPlanService";
 
 /**
  * @description get all inspections sorted by id not having newer inspection
@@ -168,9 +169,15 @@ export async function createInspection(req: Request, res: Response): Promise<any
   const assigned = req.body.assigned;
   const nextInspection = req.body.nextInspection || null;
 
+  let inspectionPlan = await InspectionPlanService.getById(inspectionPlanId);
+  if (inspectionPlan.inspectionInterval && !nextInspection)
+    throw new BadRequestException("inspection has to have nextInspection date");
+
   if (assigned != "equipment" && assigned != "vehicle" && assigned != "wearable")
     throw new BadRequestException("set assigned to equipment or vehicle or wearable");
 
+  if (relatedId == null) throw new BadRequestException("provide related equipment or vehicle or wearable");
+
   let existsUnfinished = await InspectionService.existsUnfinishedInspectionToPlan(
     inspectionPlanId,
     assigned,
diff --git a/src/controller/admin/unit/inspectionPlanController.ts b/src/controller/admin/unit/inspectionPlanController.ts
index 1165485..394f541 100644
--- a/src/controller/admin/unit/inspectionPlanController.ts
+++ b/src/controller/admin/unit/inspectionPlanController.ts
@@ -123,16 +123,18 @@ export async function getInspectionPlanById(req: Request, res: Response): Promis
  */
 export async function createInspectionPlan(req: Request, res: Response): Promise<any> {
   const title = req.body.title;
-  const inspectionInterval = req.body.inspectionInterval;
-  const remindTime = req.body.remindTime;
+  const inspectionInterval = req.body.inspectionInterval || null;
+  const remindTime = req.body.remindTime || null;
   const relatedId = req.body.relatedId;
   const assigned = req.body.assigned;
 
-  TypeTester.testPlanTimeDefinition(inspectionInterval, "inspectionInterval", true);
-  TypeTester.testPlanTimeDefinition(remindTime, "remindTime", true);
+  TypeTester.testPlanTimeDefinition(inspectionInterval, { key: "inspectionInterval", throwErr: true, allowNull: true });
+  TypeTester.testPlanTimeDefinition(remindTime, { key: "inspectionInterval", throwErr: true, allowNull: true });
 
   if (assigned != "equipment" && assigned != "vehicle" && assigned != "wearable")
-    throw new BadRequestException("set assigned to equipment or vehicle or wearable");
+    throw new BadRequestException("set assigned to equipmenttype or vehicletype or wearabletype");
+
+  if (relatedId == null) throw new BadRequestException("provide related equipmenttype or vehicletype or wearabletype");
 
   let createInspectionPlan: CreateInspectionPlanCommand = {
     title,
@@ -155,11 +157,11 @@ export async function createInspectionPlan(req: Request, res: Response): Promise
 export async function updateInspectionPlanById(req: Request, res: Response): Promise<any> {
   const inspectionPlanId = req.params.id;
   const title = req.body.title;
-  const inspectionInterval = req.body.inspectionInterval;
-  const remindTime = req.body.remindTime;
+  const inspectionInterval = req.body.inspectionInterval || null;
+  const remindTime = req.body.remindTime || null;
 
-  TypeTester.testPlanTimeDefinition(inspectionInterval, "inspectionInterval", true);
-  TypeTester.testPlanTimeDefinition(remindTime, "remindTime", true);
+  TypeTester.testPlanTimeDefinition(inspectionInterval, { key: "inspectionInterval", throwErr: true, allowNull: true });
+  TypeTester.testPlanTimeDefinition(remindTime, { key: "inspectionInterval", throwErr: true, allowNull: true });
 
   let updateInspectionPlan: UpdateInspectionPlanCommand = {
     id: inspectionPlanId,
diff --git a/src/entity/unit/inspection/inspectionPlan.ts b/src/entity/unit/inspection/inspectionPlan.ts
index 9fa6fad..3b954a4 100644
--- a/src/entity/unit/inspection/inspectionPlan.ts
+++ b/src/entity/unit/inspection/inspectionPlan.ts
@@ -13,11 +13,11 @@ export class inspectionPlan {
   @Column({ type: "varchar", length: 255 })
   title: string;
 
-  @Column({ type: "varchar", length: 255 })
-  inspectionInterval: PlanTimeDefinition;
+  @Column({ type: "varchar", length: 255, nullable: true, default: null })
+  inspectionInterval?: PlanTimeDefinition;
 
-  @Column({ type: "varchar", length: 255 })
-  remindTime: PlanTimeDefinition;
+  @Column({ type: "varchar", length: 255, nullable: true, default: null })
+  remindTime?: PlanTimeDefinition;
 
   @CreateDateColumn()
   createdAt: Date;
diff --git a/src/helpers/typeTester.ts b/src/helpers/typeTester.ts
index ab37808..d81f8eb 100644
--- a/src/helpers/typeTester.ts
+++ b/src/helpers/typeTester.ts
@@ -1,7 +1,11 @@
 import { PlanTimeDefinition } from "../viewmodel/admin/unit/inspection/inspectionPlan.models";
 
 export default abstract class TypeTester {
-  static testPlanTimeDefinition(val: string, key: string = "", throwErr: boolean = false): PlanTimeDefinition | null {
+  static testPlanTimeDefinition(
+    val: string | null,
+    { key = "", throwErr = false, allowNull = false }: { key?: string; throwErr?: boolean; allowNull?: boolean }
+  ): PlanTimeDefinition | null {
+    if (val == null && allowNull) return null;
     if (/^(\d+-(d|m|y)|\d+\/(\d+|\*))$/.test(val)) {
       return val as PlanTimeDefinition;
     } else if (throwErr) {
diff --git a/src/migrations/baseSchemaTables/inspection.ts b/src/migrations/baseSchemaTables/inspection.ts
index 76ca627..6a71127 100644
--- a/src/migrations/baseSchemaTables/inspection.ts
+++ b/src/migrations/baseSchemaTables/inspection.ts
@@ -6,8 +6,8 @@ export const inspection_plan_table = new Table({
   columns: [
     { name: "id", ...getTypeByORM("uuid"), ...isUUIDPrimary },
     { name: "title", ...getTypeByORM("varchar") },
-    { name: "inspectionInterval", ...getTypeByORM("varchar") },
-    { name: "remindTime", ...getTypeByORM("varchar") },
+    { name: "inspectionInterval", ...getTypeByORM("varchar", true) },
+    { name: "remindTime", ...getTypeByORM("varchar", true) },
     { name: "createdAt", ...getTypeByORM("datetime"), default: getDefaultByORM("currentTimestamp") },
     { name: "equipmentTypeId", ...getTypeByORM("uuid", true) },
     { name: "vehicleTypeId", ...getTypeByORM("uuid", true) },