diff --git a/frontend/app/components/api/api-v3/hal-resource-types/hal-resource-types.config.ts b/frontend/app/components/api/api-v3/hal-resource-types/hal-resource-types.config.ts
index 1b24f12c72..62e1c3c41a 100644
--- a/frontend/app/components/api/api-v3/hal-resource-types/hal-resource-types.config.ts
+++ b/frontend/app/components/api/api-v3/hal-resource-types/hal-resource-types.config.ts
@@ -55,6 +55,7 @@ function halResourceTypesConfig(halResourceTypes:HalResourceTypesService) {
         to: 'WorkPackage'
       }
     },
+    Schema: 'SchemaResource',
     Error: 'ErrorResource',
     User: 'UserResource',
     Collection: 'CollectionResource'
diff --git a/frontend/app/components/api/api-v3/hal-resources/hal-resource.service.ts b/frontend/app/components/api/api-v3/hal-resources/hal-resource.service.ts
index f5b26dc7dc..489acf1c61 100644
--- a/frontend/app/components/api/api-v3/hal-resources/hal-resource.service.ts
+++ b/frontend/app/components/api/api-v3/hal-resources/hal-resource.service.ts
@@ -29,6 +29,7 @@
 import {opApiModule} from '../../../../angular-modules';
 import {HalLinkInterface} from '../hal-link/hal-link.service';
 import {HalResourceFactoryService} from '../hal-resource-factory/hal-resource-factory.service';
+import {State} from './../../../../helpers/reactive-fassade';
 
 const ObservableArray:any = require('observable-array');
 
@@ -100,7 +101,27 @@ export class HalResource {
     this.$initialize($source);
   }
 
+  /**
+   * Return the associated state to this HAL resource, if any.
+   */
+  public get state():State<HalResource>|null {
+    return null;
+  }
+
   public $load(force = false):ng.IPromise<HalResource> {
+    const state = this.state;
+    if (!this.state) {
+      return this.$loadResource(force);
+    }
+
+    if (force) {
+      state.clear();
+    }
+
+    return <ng.IPromise<HalResource>> state.get();
+  }
+
+  protected $loadResource(force = false):ng.IPromise<HalResource> {
     if (!force) {
       if (this.$loaded) {
         return $q.when(this);
diff --git a/frontend/app/components/api/api-v3/hal-resources/schema-resource.service.ts b/frontend/app/components/api/api-v3/hal-resources/schema-resource.service.ts
new file mode 100644
index 0000000000..97a6cb56a2
--- /dev/null
+++ b/frontend/app/components/api/api-v3/hal-resources/schema-resource.service.ts
@@ -0,0 +1,55 @@
+//-- copyright
+// OpenProject is a project management system.
+// Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License version 3.
+//
+// OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
+// Copyright (C) 2006-2013 Jean-Philippe Lang
+// Copyright (C) 2010-2013 the ChiliProject Team
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+// See doc/COPYRIGHT.rdoc for more details.
+//++
+
+import {HalResource} from './hal-resource.service';
+import {opApiModule} from '../../../../angular-modules';
+import {WorkPackageResource} from './work-package-resource.service';
+import {States} from '../../../states.service';
+import {State} from './../../../../helpers/reactive-fassade';
+
+var states: States;
+
+export class SchemaResource extends HalResource {
+
+  public get state() {
+    return states.schemas.get(this.$link.href);
+  }
+}
+
+function schemaResource(...args) {
+  [
+    states,
+  ] = args;
+  return SchemaResource;
+}
+
+schemaResource.$inject = [
+  'states',
+];
+
+opApiModule.factory('SchemaResource', schemaResource);
diff --git a/frontend/app/components/api/api-v3/hal-resources/work-package-resource.service.ts b/frontend/app/components/api/api-v3/hal-resources/work-package-resource.service.ts
index 38b191130b..34f6062d96 100644
--- a/frontend/app/components/api/api-v3/hal-resources/work-package-resource.service.ts
+++ b/frontend/app/components/api/api-v3/hal-resources/work-package-resource.service.ts
@@ -36,6 +36,8 @@ import {UploadFile} from '../../op-file-upload/op-file-upload.service';
 import IQService = angular.IQService;
 import IPromise = angular.IPromise;
 import ITimeoutService = angular.ITimeoutService;
+import {States} from '../../../states.service';
+import {SchemaResource} from './schema-resource.service';
 
 interface WorkPackageResourceEmbedded {
   activities: CollectionResourceInterface;
@@ -50,7 +52,7 @@ interface WorkPackageResourceEmbedded {
   project: HalResource|any;
   relations: CollectionResourceInterface;
   responsible: HalResource|any;
-  schema: HalResource|any;
+  schema: SchemaResource|any;
   status: HalResource|any;
   timeEntries: HalResource[]|any[];
   type: HalResource|any;
@@ -80,6 +82,7 @@ var $q: IQService;
 var $stateParams: any;
 var $timeout: ITimeoutService;
 var I18n: op.I18n;
+var states: States;
 var apiWorkPackages: ApiWorkPackagesService;
 var wpCacheService: WorkPackageCacheService;
 var NotificationsService: any;
@@ -113,7 +116,7 @@ export class WorkPackageResource extends HalResource {
   public $embedded: WorkPackageResourceEmbedded;
   public $links: WorkPackageResourceLinks;
   public id: number|string;
-  public schema;
+  public schema: SchemaResource|any;
   public $pristine: { [attribute: string]: any } = {};
   public parentId: number;
   public subject: string;
@@ -146,6 +149,10 @@ export class WorkPackageResource extends HalResource {
     return this.modifiedFields.length > 0;
   }
 
+  /**
+   * Returns a reference to the
+   */
+
   public get modifiedFields(): string[] {
     var modified = [];
 
@@ -190,12 +197,8 @@ export class WorkPackageResource extends HalResource {
    * be done automatically, but the backend does not provide typed collections yet.
    */
   protected $initialize(source) {
-    const oldSchema = this.schema;
     super.$initialize(source);
 
-    // Take over previously loaded schema resource
-    this.setExistingSchema(oldSchema);
-
     var attachments = this.attachments || {$source: void 0, $loaded: void 0};
     this.attachments = new AttachmentCollectionResource(
       attachments.$source,
@@ -259,18 +262,6 @@ export class WorkPackageResource extends HalResource {
       });
   }
 
-  public requiredValueFor(fieldName): boolean {
-    var fieldSchema = this.schema[fieldName];
-
-    // The field schema may be undefined if a custom field
-    // is used as a column, but not available for this type.
-    if (angular.isUndefined(fieldSchema)) {
-      return false;
-    }
-
-    return !this[fieldName] && fieldSchema.writable && fieldSchema.required;
-  }
-
   public allowedValuesFor(field): ng.IPromise<HalResource[]> {
     var deferred = $q.defer();
 
@@ -319,15 +310,10 @@ export class WorkPackageResource extends HalResource {
 
     this.form
       .then(form => {
-        // Override the current schema with
-        // the changes from API
-        this.schema = form.$embedded.schema;
-
         // Take over new values from the form
         // this resource doesn't know yet.
         this.assignNewValues(form.$embedded.payload);
 
-        // Use the newest embedded form
         this.schema = form.$embedded.schema;
 
         deferred.resolve(form);
@@ -340,11 +326,11 @@ export class WorkPackageResource extends HalResource {
     return deferred.promise;
   }
 
-  public getSchema() {
+  public loadFormSchema() {
     return this.getForm().then(form => {
-      const schema = form.$embedded.schema;
+      this.schema = form.$embedded.schema;
 
-      angular.forEach(schema, (field, name) => {
+      angular.forEach(this.schema, (field, name) => {
         // Assign only links from schema when an href is set
         // and field is writable.
         // (exclude plain properties and null values)
@@ -355,11 +341,11 @@ export class WorkPackageResource extends HalResource {
         const hasAllowedValues = Array.isArray(field.allowedValues) && field.allowedValues.length > 0;
 
         if (isHalField && hasAllowedValues) {
-          this[name] = _.find(field.allowedValues, {href: this[name].href});
+          this[name] = _.find(field.allowedValues, {href: this[name].href}) || this[name];
         }
       });
 
-      return schema;
+      return this.schema;
     });
   }
 
@@ -373,26 +359,30 @@ export class WorkPackageResource extends HalResource {
         const sentValues = Object.keys(this.$pristine);
 
         this.$links.updateImmediately(payload)
-          .then(workPackage => {
-            // Initialize any potentially new HAL values
-            this.$initialize(workPackage);
-            this.updateActivities();
-
-            if (wasNew) {
-              this.uploadPendingAttachments();
-              wpCacheService.newWorkPackageCreated(this);
-            }
-
-            // Remove only those pristine values that were submitted
-            angular.forEach(sentValues, (key) => {
-              delete this.$pristine[key];
-            });
-
+          .then((workPackage:WorkPackageResource) => {
             // Remove the current form, otherwise old form data
-            // might still be used for the next edit field in #getSchema()
+            // might still be used for the next edit field to be edited
             this.form = null;
 
-            deferred.resolve(this);
+            // Ensure the schema is loaded before updating
+            workPackage.schema.$load().then((schema) => {
+              // Initialize any potentially new HAL values
+              this.$initialize(workPackage);
+              this.schema = schema;
+              this.updateActivities();
+
+              if (wasNew) {
+                this.uploadPendingAttachments();
+                wpCacheService.newWorkPackageCreated(this);
+              }
+
+              // Remove only those pristine values that were submitted
+              angular.forEach(sentValues, (key) => {
+                delete this.$pristine[key];
+              });
+
+              deferred.resolve(this);
+            });
           })
           .catch(error => {
             deferred.reject(error);
@@ -460,25 +450,6 @@ export class WorkPackageResource extends HalResource {
     });
   }
 
-  private setExistingSchema(previous) {
-    // Only when existing schema was loaded
-    if (!(previous && previous.$loaded)) {
-      return;
-    }
-
-    // If old schema was a regular schema and both href match
-    // assume they are matching
-    if (previous.href === this.schema.href) {
-      this.schema = previous;
-    }
-
-    // If old schema was embedded into the WP form, decide
-    // based on its baseSchema href.
-    if (previous.baseSchema && previous.baseSchema.href === this.schema.href) {
-      this.schema = previous;
-    }
-  }
-
   /**
    * Invalidate a set of linked resources of this work package.
    * And inform the cache service about the work package update.
@@ -557,6 +528,7 @@ function wpResource(...args) {
     $stateParams,
     $timeout,
     I18n,
+    states,
     apiWorkPackages,
     wpCacheService,
     NotificationsService,
@@ -570,6 +542,7 @@ wpResource.$inject = [
   '$stateParams',
   '$timeout',
   'I18n',
+  'states',
   'apiWorkPackages',
   'wpCacheService',
   'NotificationsService',
diff --git a/frontend/app/components/api/api-work-packages/api-work-packages.service.ts b/frontend/app/components/api/api-work-packages/api-work-packages.service.ts
index a782707e68..a865d24c1a 100644
--- a/frontend/app/components/api/api-work-packages/api-work-packages.service.ts
+++ b/frontend/app/components/api/api-work-packages/api-work-packages.service.ts
@@ -55,12 +55,21 @@ export class ApiWorkPackagesService {
    */
   public loadWorkPackageById(id:number, force = false) {
     const url = this.v3Path.wp({wp: id});
+    const deferred = this.$q.defer();
 
-    return <IPromise<WorkPackageResource>> this.halRequest.get(url, null, {
+    this.halRequest.get(url, null, {
       caching: {
         enabled: !force
       }
-    });
+    })
+    .then((workPackage:WorkPackageResource) => {
+      workPackage.schema.$load().then(() => {
+       deferred.resolve(workPackage);
+      })
+    })
+    .catch(deferred.reject);
+
+    return deferred.promise;
   }
 
   /**
diff --git a/frontend/app/components/routing/wp-list/wp-list.controller.test.ts b/frontend/app/components/routing/wp-list/wp-list.controller.test.ts
index 3b3d50efbc..f511c65486 100644
--- a/frontend/app/components/routing/wp-list/wp-list.controller.test.ts
+++ b/frontend/app/components/routing/wp-list/wp-list.controller.test.ts
@@ -175,6 +175,12 @@ describe('WorkPackagesListController', () => {
       }
     };
 
+    var workPackage = {
+      schema: {
+        '$load': () => { return $q.when(true) }
+      }
+    }
+
     wpListServiceMock = {
       fromQueryParams() {
         return $q.when({
@@ -186,9 +192,7 @@ describe('WorkPackagesListController', () => {
           resource: {
             total: 10
           },
-          work_packages: [
-            {}
-          ]
+          work_packages: [ workPackage ]
         });
       }
     };
diff --git a/frontend/app/components/routing/wp-view-base/wp-view-base.controller.ts b/frontend/app/components/routing/wp-view-base/wp-view-base.controller.ts
index 47970014bf..45ad80d196 100644
--- a/frontend/app/components/routing/wp-view-base/wp-view-base.controller.ts
+++ b/frontend/app/components/routing/wp-view-base/wp-view-base.controller.ts
@@ -100,9 +100,6 @@ export class WorkPackageViewController {
    * Initialize controller after workPackage resource has been loaded.
    */
   protected init() {
-    // Ensure the schema is being loaded as soon as possible
-    this.workPackage.schema.$load();
-
     // Set elements
     this.workPackage.project.$load().then(() => {
       this.projectIdentifier = this.workPackage.project.identifier;
diff --git a/frontend/app/components/states.service.ts b/frontend/app/components/states.service.ts
index 8b76b53157..46487f3bc8 100644
--- a/frontend/app/components/states.service.ts
+++ b/frontend/app/components/states.service.ts
@@ -1,10 +1,12 @@
 import {MultiState, initStates} from "../helpers/reactive-fassade";
 import {WorkPackageResource} from "./api/api-v3/hal-resources/work-package-resource.service";
 import {opServicesModule} from "../angular-modules";
+import {SchemaResource} from './api/api-v3/hal-resources/schema-resource.service';
 
 export class States {
 
   workPackages = new MultiState<WorkPackageResource>();
+  schemas = new MultiState<SchemaResource>();
 
   constructor() {
     initStates(this, function (msg: any) {
diff --git a/frontend/app/components/work-packages/work-package-cache.service.ts b/frontend/app/components/work-packages/work-package-cache.service.ts
index 828f176265..116938b85d 100644
--- a/frontend/app/components/work-packages/work-package-cache.service.ts
+++ b/frontend/app/components/work-packages/work-package-cache.service.ts
@@ -64,7 +64,9 @@ export class WorkPackageCacheService {
         ? wpState.getCurrentValue() // dirty, use current wp
         : wp; // not dirty or unknown, use new wp
 
-      this.states.workPackages.put(workPackageId, wpForPublish);
+      wpForPublish.schema.$load().then(() => {
+        this.states.workPackages.put(workPackageId, wpForPublish);
+      });
     }
   }
 
diff --git a/frontend/app/components/work-packages/wp-display-attr/wp-display-attr.directive.ts b/frontend/app/components/work-packages/wp-display-attr/wp-display-attr.directive.ts
index de35edc930..7a20632b4e 100644
--- a/frontend/app/components/work-packages/wp-display-attr/wp-display-attr.directive.ts
+++ b/frontend/app/components/work-packages/wp-display-attr/wp-display-attr.directive.ts
@@ -93,19 +93,17 @@ export class WorkPackageDisplayAttributeController {
 
   protected updateAttribute(wp) {
     this.workPackage = wp;
-    this.schema.$load().then(() => {
-      this.field = <DisplayField>this.wpDisplayField.getField(this.workPackage, this.attribute, this.schema[this.attribute]);
+    this.field = <DisplayField>this.wpDisplayField.getField(this.workPackage, this.attribute, this.schema[this.attribute]);
 
-        if (this.field.isManualRenderer) {
-          this.__d__renderer = this.__d__renderer || this.$element.find(".__d__renderer");
-          this.field.render(this.__d__renderer, this);
-        }
+      if (this.field.isManualRenderer) {
+        this.__d__renderer = this.__d__renderer || this.$element.find(".__d__renderer");
+        this.field.render(this.__d__renderer, this);
+      }
 
-        this.$element.attr("aria-label", this.label + " " + this.displayText);
+      this.$element.attr("aria-label", this.label + " " + this.displayText);
 
-        this.__d__cell = this.__d__cell || this.$element.find(".__d__cell");
-        this.__d__cell.toggleClass("-placeholder", this.isEmpty);
-    });
+      this.__d__cell = this.__d__cell || this.$element.find(".__d__cell");
+      this.__d__cell.toggleClass("-placeholder", this.isEmpty);
   }
 }
 
diff --git a/frontend/app/components/work-packages/wp-single-view/wp-single-view.directive.ts b/frontend/app/components/work-packages/wp-single-view/wp-single-view.directive.ts
index b886fef97c..7108020165 100644
--- a/frontend/app/components/work-packages/wp-single-view/wp-single-view.directive.ts
+++ b/frontend/app/components/work-packages/wp-single-view/wp-single-view.directive.ts
@@ -124,27 +124,24 @@ export class WorkPackageSingleViewController {
       this.workPackage.attachments.updateElements();
     }
 
-    this.workPackage.schema.$load().then(schema => {
-      this.setFocus();
+    this.setFocus();
 
-      var otherGroup: any = _.find(this.groupedFields, {groupName: 'other'});
-      otherGroup.attributes = [];
+    var otherGroup: any = _.find(this.groupedFields, {groupName: 'other'});
+    otherGroup.attributes = [];
 
-      angular.forEach(schema, (prop, propName) => {
-        if (propName.match(/^customField/)) {
-          otherGroup.attributes.push(propName);
-        }
-      });
+    angular.forEach(this.workPackage.schema, (prop, propName) => {
+      if (propName.match(/^customField/)) {
+        otherGroup.attributes.push(propName);
+      }
+    });
 
-      otherGroup.attributes.sort((leftField, rightField) => {
-        var getLabel = field => this.singleViewWp.getLabel(field);
-        var left = getLabel(leftField).toLowerCase();
-        var right = getLabel(rightField).toLowerCase();
+    otherGroup.attributes.sort((leftField, rightField) => {
+      var getLabel = field => this.singleViewWp.getLabel(field);
+      var left = getLabel(leftField).toLowerCase();
+      var right = getLabel(rightField).toLowerCase();
 
-        return left.localeCompare(right);
-      });
+      return left.localeCompare(right);
     });
-
   }
 }
 
diff --git a/frontend/app/components/wp-edit/wp-edit-field/wp-edit-field.directive.ts b/frontend/app/components/wp-edit/wp-edit-field/wp-edit-field.directive.ts
index dcc94ef3ee..1a33a28699 100644
--- a/frontend/app/components/wp-edit/wp-edit-field/wp-edit-field.directive.ts
+++ b/frontend/app/components/wp-edit/wp-edit-field/wp-edit-field.directive.ts
@@ -116,40 +116,38 @@ export class WorkPackageEditFieldController {
   }
 
   public initializeField() {
-    // Activate field when creating a work package
-    // and the schema requires this field
-    if (this.workPackage.isNew && this.workPackage.requiredValueFor(this.fieldName)) {
-      this.activate();
-
-      var activeField = this.formCtrl.firstActiveField;
-      if (!activeField || this.formCtrl.fields[activeField].fieldIndex > this.fieldIndex) {
-        this.formCtrl.firstActiveField = this.fieldName;
-      }
-    }
-
     // Mark the td field if it is inline-editable
     // We're resolving the non-form schema here since its loaded anyway for the table
-    this.workPackage.schema.$load().then(schema => {
-      var fieldSchema = schema[this.fieldName];
+    const fieldSchema = this.workPackage.schema[this.fieldName];
+
+    this.editable = fieldSchema && fieldSchema.writable;
+    this.fieldType = fieldSchema && this.wpEditField.fieldType(fieldSchema.type);
 
-      this.editable = fieldSchema && fieldSchema.writable;
-      this.fieldType = fieldSchema && this.wpEditField.fieldType(fieldSchema.type);
+    this.updateDisplayAttributes();
 
-      this.updateDisplayAttributes();
+    if (fieldSchema) {
+      this.fieldLabel = this.fieldLabel || fieldSchema.name;
 
-      if (fieldSchema) {
-        this.fieldLabel = this.fieldLabel || fieldSchema.name;
+      // Activate field when creating a work package
+      // and the schema requires this field
+      if (this.workPackage.isNew && this.isRequired() && !this.workPackage[this.fieldName]) {
+        this.activate();
 
-        // Activate the field automatically when in editAllMode
-        if (this.inEditMode && this.isEditable) {
-          // Set focus on the first field
-          if(this.fieldName === 'subject')
-            this.activate(true);
-          else
-            this.activate();
+        var activeField = this.formCtrl.firstActiveField;
+        if (!activeField || this.formCtrl.fields[activeField].fieldIndex > this.fieldIndex) {
+          this.formCtrl.firstActiveField = this.fieldName;
         }
       }
-    });
+
+      // Activate the field automatically when in editAllMode
+      if (this.inEditMode && this.isEditable) {
+        // Set focus on the first field
+        if (this.fieldName === 'subject')
+          this.activate(true);
+        else
+          this.activate();
+      }
+    }
   }
 
   public activateIfEditable(event) {
@@ -314,7 +312,7 @@ export class WorkPackageEditFieldController {
   }
 
   protected buildEditField(): ng.IPromise<any> {
-    return this.formCtrl.loadSchema().then(schema => {
+    return this.workPackage.loadFormSchema().then(schema => {
       this.field = <EditField>this.wpEditField.getField(this.workPackage, this.fieldName, schema[this.fieldName]);
       this.workPackage.storePristine(this.fieldName);
     });
diff --git a/frontend/app/components/wp-edit/wp-edit-form.directive.ts b/frontend/app/components/wp-edit/wp-edit-form.directive.ts
index e4f6245366..18a23e80bf 100644
--- a/frontend/app/components/wp-edit/wp-edit-form.directive.ts
+++ b/frontend/app/components/wp-edit/wp-edit-form.directive.ts
@@ -63,12 +63,6 @@ export class WorkPackageEditFormController {
       });
   }
 
-  public isFieldRequired() {
-    return _.filter((this.fields as any), (name: string) => {
-      return !this.workPackage[name] && this.workPackage.requiredValueFor(name);
-    });
-  }
-
   public registerField(field) {
     this.fields[field.fieldName] = field;
     field.setErrors(this.errorsPerAttribute[field.fieldName] || []);
@@ -105,10 +99,6 @@ export class WorkPackageEditFormController {
     return this.workPackage.isEditable;
   }
 
-  public loadSchema() {
-    return this.workPackage.getSchema();
-  }
-
   /**
    * Update the form and embedded schema.
    * In edit-all mode, this allows fields to cause changes to the form (e.g., type switch)