diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/resources/entities/Resource.java b/navalplanner-business/src/main/java/org/navalplanner/business/resources/entities/Resource.java
index 497e76a1a..3e35d3893 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/resources/entities/Resource.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/resources/entities/Resource.java
@@ -834,12 +834,8 @@ public abstract class Resource extends IntegrationEntity {
 
     }
 
-    public int getAssignedHours(LocalDate localDate) {
-        int sum = 0;
-        for (DayAssignment dayAssignment : getAssignmentsForDay(localDate)) {
-            sum += dayAssignment.getHours();
-        }
-        return sum;
+    public EffortDuration getAssignedEffort(LocalDate localDate) {
+        return DayAssignment.sum(getAssignmentsForDay(localDate));
     }
 
     public EffortDuration getAssignedDurationDiscounting(
diff --git a/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/DerivedAllocationGeneratorTest.java b/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/DerivedAllocationGeneratorTest.java
index 156818404..a2ef5d64b 100644
--- a/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/DerivedAllocationGeneratorTest.java
+++ b/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/DerivedAllocationGeneratorTest.java
@@ -124,8 +124,6 @@ public class DerivedAllocationGeneratorTest {
 
     private Worker workerWithAlwaysAssignedHours(int assignedHours){
         Worker result = createNiceMock(Worker.class);
-        expect(result.getAssignedHours(isA(LocalDate.class))).andReturn(
-                assignedHours).anyTimes();
         expect(
                 result.getAssignedDurationDiscounting(isA(Object.class),
                         isA(LocalDate.class))).andReturn(hours(assignedHours))
diff --git a/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/GenericResourceAllocationTest.java b/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/GenericResourceAllocationTest.java
index e58701b4c..f59c5fa0c 100644
--- a/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/GenericResourceAllocationTest.java
+++ b/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/GenericResourceAllocationTest.java
@@ -176,8 +176,6 @@ public class GenericResourceAllocationTest {
             int hours) {
         Worker result = createNiceMock(Worker.class);
         expect(result.getCalendar()).andReturn(resourceCalendar).anyTimes();
-        expect(result.getAssignedHours(isA(LocalDate.class))).andReturn(hours)
-                .anyTimes();
         expect(
                 result.getAssignedDurationDiscounting(isA(Object.class),
                         isA(LocalDate.class))).andReturn(hours(hours)).anyTimes();
@@ -561,8 +559,6 @@ public class GenericResourceAllocationTest {
     private void givenVirtualWorkerWithCapacity(int capacity) {
         VirtualWorker worker = createNiceMock(VirtualWorker.class);
         final int fullLoadForAll = 8 * capacity;
-        expect(worker.getAssignedHours(isA(LocalDate.class))).andReturn(
-                fullLoadForAll).anyTimes();
         expect(
                 worker.getAssignedDurationDiscounting(isA(Object.class),
                         isA(LocalDate.class))).andReturn(hours(fullLoadForAll))
diff --git a/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/SpecificResourceAllocationTest.java b/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/SpecificResourceAllocationTest.java
index ff2db6aac..2a1723d5a 100644
--- a/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/SpecificResourceAllocationTest.java
+++ b/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/SpecificResourceAllocationTest.java
@@ -173,8 +173,6 @@ public class SpecificResourceAllocationTest {
     private void givenWorker() {
         this.worker = createNiceMock(Worker.class);
         expect(this.worker.getCalendar()).andReturn(calendar).anyTimes();
-        expect(this.worker.getAssignedHours(isA(LocalDate.class))).andReturn(
-                assignedHours).anyTimes();
         replay(this.worker);
     }
 
diff --git a/navalplanner-business/src/test/java/org/navalplanner/business/test/resources/entities/ResourceTest.java b/navalplanner-business/src/test/java/org/navalplanner/business/test/resources/entities/ResourceTest.java
index 14331e76c..80e312afb 100644
--- a/navalplanner-business/src/test/java/org/navalplanner/business/test/resources/entities/ResourceTest.java
+++ b/navalplanner-business/src/test/java/org/navalplanner/business/test/resources/entities/ResourceTest.java
@@ -551,7 +551,7 @@ public class ResourceTest {
     public void workerWithoutAssignmentsGivesNoAssignedHours() {
         givenWorker();
         LocalDate today = new LocalDate();
-        assertThat(worker.getAssignedHours(today), equalTo(0));
+        assertThat(worker.getAssignedEffort(today), equalTo(hours(0)));
     }
 
     @Test
@@ -566,7 +566,7 @@ public class ResourceTest {
                 today.plusDays(1), hours(1), worker);
         givenWorkerWithAssignments(specificDayAssignment, another, atAnotherDay);
 
-        assertThat(worker.getAssignedHours(today), equalTo(13));
+        assertThat(worker.getAssignedEffort(today), equalTo(hours(13)));
     }
 
     @Test
@@ -576,12 +576,11 @@ public class ResourceTest {
         SpecificDayAssignment specificDayAssignment = new SpecificDayAssignment(
                 today, hours(10), worker);
         givenWorkerWithAssignments(specificDayAssignment);
-        worker.getAssignedHours(today);
         SpecificDayAssignment another = new SpecificDayAssignment(today,
                 hours(3), worker);
         worker.addNewAssignments(Arrays.asList(another));
 
-        assertThat(worker.getAssignedHours(today), equalTo(13));
+        assertThat(worker.getAssignedEffort(today), equalTo(hours(13)));
     }
 
     private void givenWorkerWithAssignments(DayAssignment... assignments) {