addons/mrp_byproduct/security/ir.model.access.csv

   1 id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink\r
   2 access_mrp_subproduct_user,mrp.subproduct,model_mrp_subproduct,mrp.group_mrp_user,1,0,0,0\r
   3 access_mrp_subproduct_manager,mrp.subproduct manager,model_mrp_subproduct,mrp.group_mrp_manager,1,1,1,1\r
   4 access_mrp_subproduct_all,mrp.subproduct,model_mrp_subproduct,base.group_user,1,0,0,0\r