diff --git a/htdocs/projet/class/task.class.php b/htdocs/projet/class/task.class.php
index ea0cce9e121..c97b51e53a4 100644
--- a/htdocs/projet/class/task.class.php
+++ b/htdocs/projet/class/task.class.php
@@ -41,7 +41,7 @@ class Task extends CommonObject
     var $fk_task_parent;
     var $label;
     var $description;
-    var $duration_effective;
+    var $duration_effective;		// total of time spent on this task
     var $planned_workload;
     var $date_c;
     var $date_start;
diff --git a/htdocs/projet/tasks/task.php b/htdocs/projet/tasks/task.php
index dd83cf57d8f..908a9513162 100644
--- a/htdocs/projet/tasks/task.php
+++ b/htdocs/projet/tasks/task.php
@@ -348,7 +348,7 @@ if ($id > 0 || ! empty($ref))
 			print '</td></tr>';
 
 			// Progress
-			print '<tr><td>'.$langs->trans("Progress").'</td><td colspan="3">';
+			print '<tr><td>'.$langs->trans("ProgressDeclared").'</td><td colspan="3">';
 			print $formother->select_percent($object->progress,'progress');
 			print '</td></tr>';
 
@@ -436,14 +436,15 @@ if ($id > 0 || ! empty($ref))
 			print convertSecondToTime($object->planned_workload,'allhourmin');
 			print '</td></tr>';
 
-			// Progress
+			// Declared progress
 			print '<tr><td>'.$langs->trans("ProgressDeclared").'</td><td colspan="3">';
 			print $object->progress.' %';
 			print '</td></tr>';
 
-			// Progress
+			// Calculated progress
 			print '<tr><td>'.$langs->trans("ProgressCalculated").'</td><td colspan="3">';
-			print $object->progress.' %';
+			if ($object->planned_workload) print round(100 * $object->duration_effective / $object->planned_workload,2).' %';
+			else print '';
 			print '</td></tr>';
 
 			// Description
diff --git a/htdocs/projet/tasks/time.php b/htdocs/projet/tasks/time.php
index cb8a4dd193a..7136ffc43c5 100644
--- a/htdocs/projet/tasks/time.php
+++ b/htdocs/projet/tasks/time.php
@@ -50,7 +50,7 @@ $projectstatic = new Project($db);
 
 /*
  * Actions
-*/
+ */
 
 if ($action == 'addtimespent' && $user->rights->projet->creer)
 {
@@ -171,7 +171,7 @@ if (! empty($project_ref) && ! empty($withproject))
 
 /*
  * View
-*/
+ */
 
 llxHeader("",$langs->trans("Task"));
 
@@ -283,9 +283,6 @@ if ($id > 0 || ! empty($ref))
 		// Label
 		print '<tr><td>'.$langs->trans("Label").'</td><td colspan="3">'.$object->label.'</td></tr>';
 
-		// Planned workload
-		print '<tr><td>'.$langs->trans("PlannedWorkload").'</td><td colspan="3">'.convertSecondToTime($object->planned_workload,'allhourmin').'</td></tr>';
-
 		// Project
 		if (empty($withproject))
 		{
@@ -300,6 +297,30 @@ if ($id > 0 || ! empty($ref))
 			print '</td></tr>';
 		}
 
+		// Date start
+		print '<tr><td>'.$langs->trans("DateStart").'</td><td colspan="3">';
+		print dol_print_date($object->date_start,'dayhour');
+		print '</td></tr>';
+
+		// Date end
+		print '<tr><td>'.$langs->trans("DateEnd").'</td><td colspan="3">';
+		print dol_print_date($object->date_end,'dayhour');
+		print '</td></tr>';
+
+		// Planned workload
+		print '<tr><td>'.$langs->trans("PlannedWorkload").'</td><td colspan="3">'.convertSecondToTime($object->planned_workload,'allhourmin').'</td></tr>';
+
+		// Declared progress
+		print '<tr><td>'.$langs->trans("ProgressDeclared").'</td><td colspan="3">';
+		print $object->progress.' %';
+		print '</td></tr>';
+
+		// Calculated progress
+		print '<tr><td>'.$langs->trans("ProgressCalculated").'</td><td colspan="3">';
+		if ($object->planned_workload) print round(100 * $object->duration_effective / $object->planned_workload,2).' %';
+		else print '';
+		print '</td></tr>';
+
 		print '</table>';
 
 		dol_fiche_end();