=== modified file 'mrp/wizard/change_production_qty.py'
--- mrp/wizard/change_production_qty.py	2012-08-17 08:43:48 +0000
+++ mrp/wizard/change_production_qty.py	2013-11-19 12:48:20 +0000
@@ -83,7 +83,7 @@
                 if not bom_id:
                     raise osv.except_osv(_('Error'), _("Couldn't find bill of material for product"))
         
-                factor = prod.product_qty * prod.product_uom.factor / bom_point.product_uom.factor
+                factor = prod.product_qty / prod.product_uom.factor / bom_point.product_uom.factor
                 res = bom_obj._bom_explode(cr, uid, bom_point, factor / bom_point.product_qty, [])
                 for r in res[0]:
                     if r['product_id'] == move.product_id.id: