diff --git a/htdocs/bom/class/bom.class.php b/htdocs/bom/class/bom.class.php
index 9f6a2a7a6a6..153554933cd 100644
--- a/htdocs/bom/class/bom.class.php
+++ b/htdocs/bom/class/bom.class.php
@@ -94,18 +94,19 @@ class BOM extends CommonObject
 	    'ref' => array('type'=>'varchar(128)', 'label'=>'Ref', 'enabled'=>1, 'noteditable'=>1, 'visible'=>4, 'position'=>10, 'notnull'=>1, 'default'=>'(PROV)', 'index'=>1, 'searchall'=>1, 'comment'=>"Reference of BOM", 'showoncombobox'=>'1',),
 		'label' => array('type'=>'varchar(255)', 'label'=>'Label', 'enabled'=>1, 'visible'=>1, 'position'=>30, 'notnull'=>1, 'searchall'=>1, 'showoncombobox'=>'1',),
 		'description' => array('type'=>'text', 'label'=>'Description', 'enabled'=>1, 'visible'=>-1, 'position'=>60, 'notnull'=>-1,),
-		'note_public' => array('type'=>'html', 'label'=>'NotePublic', 'enabled'=>1, 'visible'=>-1, 'position'=>61, 'notnull'=>-1,),
-		'note_private' => array('type'=>'html', 'label'=>'NotePrivate', 'enabled'=>1, 'visible'=>-1, 'position'=>62, 'notnull'=>-1,),
-		'date_creation' => array('type'=>'datetime', 'label'=>'DateCreation', 'enabled'=>1, 'visible'=>-2, 'position'=>500, 'notnull'=>1,),
-		'tms' => array('type'=>'timestamp', 'label'=>'DateModification', 'enabled'=>1, 'visible'=>-2, 'position'=>501, 'notnull'=>1,),
-	    'date_valid' => array('type'=>'datetime', 'label'=>'DateValidation', 'enabled'=>1, 'visible'=>-2, 'position'=>502, 'notnull'=>0,),
-	    'fk_user_creat' => array('type'=>'integer', 'label'=>'UserValidation', 'enabled'=>1, 'visible'=>-2, 'position'=>510, 'notnull'=>1, 'foreignkey'=>'llx_user.rowid',),
-		'fk_user_modif' => array('type'=>'integer', 'label'=>'UserModif', 'enabled'=>1, 'visible'=>-2, 'position'=>511, 'notnull'=>-1,),
-	    'fk_user_valid' => array('type'=>'integer', 'label'=>'UserValidation', 'enabled'=>1, 'visible'=>-2, 'position'=>512, 'notnull'=>0,),
-	    'import_key' => array('type'=>'varchar(14)', 'label'=>'ImportId', 'enabled'=>1, 'visible'=>-2, 'position'=>1000, 'notnull'=>-1,),
 		'fk_product' => array('type'=>'integer:Product:product/class/product.class.php', 'label'=>'Product', 'enabled'=>1, 'visible'=>1, 'position'=>50, 'notnull'=>1, 'index'=>1, 'help'=>'ProductBOMHelp'),
 	    'qty' => array('type'=>'real', 'label'=>'Quantity', 'enabled'=>1, 'visible'=>1, 'default'=>1, 'position'=>55, 'notnull'=>1, 'isameasure'=>'1', 'css'=>'maxwidth75imp'),
-	    'status' => array('type'=>'integer', 'label'=>'Status', 'enabled'=>1, 'visible'=>1, 'position'=>1000, 'notnull'=>1, 'default'=>0, 'index'=>1, 'arrayofkeyval'=>array(0=>'Draft', 1=>'Enabled', 9=>'Disabled')),
+		'efficiency' => array('type'=>'real', 'label'=>'ManufacturingEfficiency', 'enabled'=>1, 'visible'=>1, 'default'=>1, 'position'=>100, 'notnull'=>0, 'css'=>'maxwidth50imp', 'help'=>'ValueOfMeansLoss'),
+		'note_public' => array('type'=>'html', 'label'=>'NotePublic', 'enabled'=>1, 'visible'=>-1, 'position'=>161, 'notnull'=>-1,),
+		'note_private' => array('type'=>'html', 'label'=>'NotePrivate', 'enabled'=>1, 'visible'=>-1, 'position'=>162, 'notnull'=>-1,),
+		'date_creation' => array('type'=>'datetime', 'label'=>'DateCreation', 'enabled'=>1, 'visible'=>-2, 'position'=>300, 'notnull'=>1,),
+		'tms' => array('type'=>'timestamp', 'label'=>'DateModification', 'enabled'=>1, 'visible'=>-2, 'position'=>501, 'notnull'=>1,),
+		'date_valid' => array('type'=>'datetime', 'label'=>'DateValidation', 'enabled'=>1, 'visible'=>-2, 'position'=>502, 'notnull'=>0,),
+		'fk_user_creat' => array('type'=>'integer', 'label'=>'UserValidation', 'enabled'=>1, 'visible'=>-2, 'position'=>510, 'notnull'=>1, 'foreignkey'=>'llx_user.rowid',),
+		'fk_user_modif' => array('type'=>'integer', 'label'=>'UserModif', 'enabled'=>1, 'visible'=>-2, 'position'=>511, 'notnull'=>-1,),
+		'fk_user_valid' => array('type'=>'integer', 'label'=>'UserValidation', 'enabled'=>1, 'visible'=>-2, 'position'=>512, 'notnull'=>0,),
+		'import_key' => array('type'=>'varchar(14)', 'label'=>'ImportId', 'enabled'=>1, 'visible'=>-2, 'position'=>900, 'notnull'=>-1,),
+		'status' => array('type'=>'integer', 'label'=>'Status', 'enabled'=>1, 'visible'=>1, 'position'=>1000, 'notnull'=>1, 'default'=>0, 'index'=>1, 'arrayofkeyval'=>array(0=>'Draft', 1=>'Enabled', 9=>'Disabled')),
 	);
 	public $rowid;
 	public $ref;
@@ -121,6 +122,7 @@ class BOM extends CommonObject
 	public $status;
 	public $fk_product;
 	public $qty;
+	public $efficiency;
 	// END MODULEBUILDER PROPERTIES
 
 
diff --git a/htdocs/core/tpl/commonfields_view.tpl.php b/htdocs/core/tpl/commonfields_view.tpl.php
index f6d59435e74..49b234c651c 100644
--- a/htdocs/core/tpl/commonfields_view.tpl.php
+++ b/htdocs/core/tpl/commonfields_view.tpl.php
@@ -90,10 +90,10 @@ foreach($object->fields as $key => $val)
 
 	print '<tr><td';
 	print ' class="titlefield fieldname_'.$key;
-	if ($val['notnull'] > 0) print ' fieldrequired';
+	//if ($val['notnull'] > 0) print ' fieldrequired';		// No fieldrequired inthe view output
 	if ($val['type'] == 'text' || $val['type'] == 'html') print ' tdtop';
 	print '">';
-	if (! empty($val['help'])) print $form->textwithpicto($langs->trans($val['label']), $val['help']);
+	if (! empty($val['help'])) print $form->textwithpicto($langs->trans($val['label']), $langs->trans($val['help']));
 	else print $langs->trans($val['label']);
 	print '</td>';
 	print '<td>';
diff --git a/htdocs/install/mysql/migration/9.0.0-10.0.0.sql b/htdocs/install/mysql/migration/9.0.0-10.0.0.sql
index 035cd0d48c5..e4fc1b04f29 100644
--- a/htdocs/install/mysql/migration/9.0.0-10.0.0.sql
+++ b/htdocs/install/mysql/migration/9.0.0-10.0.0.sql
@@ -212,19 +212,22 @@ CREATE TABLE llx_bom_bom(
 	description text, 
 	note_public text, 
 	note_private text, 
+	fk_product integer, 
+	qty double(24,8),
+	efficiency double(8,4),
 	date_creation datetime NOT NULL, 
-	tms timestamp NOT NULL, 
+	tms timestamp, 
 	date_valid datetime, 
 	fk_user_creat integer NOT NULL, 
 	fk_user_modif integer, 
 	fk_user_valid integer, 
 	import_key varchar(14), 
-	status integer NOT NULL, 
-	fk_product integer, 
-	qty double(24,8)
+	status integer NOT NULL 
 	-- END MODULEBUILDER FIELDS
 ) ENGINE=innodb;
 
+ALTER TABLE llx_bom_bom ADD COLUMN efficiency double(24,8) DEFAULT 1;
+
 create table llx_bom_bom_extrafields
 (
   rowid                     integer AUTO_INCREMENT PRIMARY KEY,
diff --git a/htdocs/install/mysql/tables/llx_bom_bom.sql b/htdocs/install/mysql/tables/llx_bom_bom.sql
index a406229a0e4..4e559566817 100644
--- a/htdocs/install/mysql/tables/llx_bom_bom.sql
+++ b/htdocs/install/mysql/tables/llx_bom_bom.sql
@@ -23,6 +23,9 @@ CREATE TABLE llx_bom_bom(
 	description text, 
 	note_public text, 
 	note_private text, 
+	fk_product integer, 
+	qty double(24,8),
+	efficiency double(8,4) DEFAULT 1,
 	date_creation datetime NOT NULL, 
 	tms timestamp, 
 	date_valid datetime, 
@@ -30,8 +33,6 @@ CREATE TABLE llx_bom_bom(
 	fk_user_modif integer, 
 	fk_user_valid integer, 
 	import_key varchar(14), 
-	status integer NOT NULL, 
-	fk_product integer, 
-	qty double(24,8)
+	status integer NOT NULL 
 	-- END MODULEBUILDER FIELDS
 ) ENGINE=innodb;
\ No newline at end of file
diff --git a/htdocs/langs/en_US/main.lang b/htdocs/langs/en_US/main.lang
index 233861a2f0e..fd74d0cae07 100644
--- a/htdocs/langs/en_US/main.lang
+++ b/htdocs/langs/en_US/main.lang
@@ -971,3 +971,5 @@ ShowMoreInfos=Show More Infos
 NoFilesUploadedYet=Please upload a document first
 SeePrivateNote=See private note
 PaymentInformation=Payment information
+ValidFrom=Valid from
+ValidUntil=Valid until
\ No newline at end of file
diff --git a/htdocs/langs/en_US/mrp.lang b/htdocs/langs/en_US/mrp.lang
index 0d57c7ed4a7..c4bb9193a33 100644
--- a/htdocs/langs/en_US/mrp.lang
+++ b/htdocs/langs/en_US/mrp.lang
@@ -11,3 +11,5 @@ BOMsModelModule=BOMS document templates
 FreeLegalTextOnBOMs=Free text on document of BOM
 WatermarkOnDraftBOMs=Watermark on draft BOM
 ConfirmCloneBillOfMaterials=Are you sure you want to clone this bill of material ?
+ManufacturingEfficiency=Manufacturing efficiency
+ValueOfMeansLoss=Value of 0.95 means an average of 5%% of loss during the production