diff --git a/runbot/models/build.py b/runbot/models/build.py
index 02131da5..637196de 100644
--- a/runbot/models/build.py
+++ b/runbot/models/build.py
@@ -98,6 +98,7 @@ class runbot_build(models.Model):
     config_id = fields.Many2one('runbot.build.config', 'Run Config', required=True, default=lambda self: self.env.ref('runbot.runbot_build_config_default', raise_if_not_found=False))
     real_build = fields.Many2one('runbot.build', 'Real Build', help="duplicate_id or self", compute='_compute_real_build')
     log_list = fields.Char('Comma separted list of step_ids names with logs', compute="_compute_log_list", store=True)
+    orphan_result = fields.Boolean('No effect on the parent result', default=False)
 
     @api.depends('config_id')
     def _compute_log_list(self):  # storing this field because it will be access trhoug repo viewn and keep track of the list at create
@@ -131,20 +132,23 @@ class runbot_build(models.Model):
 
     # random note: need to count hidden in pending and testing build displayed in frontend
 
-    @api.depends('children_ids.global_result', 'local_result', 'duplicate_id.global_result')
+    @api.depends('children_ids.global_result', 'local_result', 'duplicate_id.global_result', 'children_ids.orphan_result')
     def _compute_global_result(self):
         for record in self:  # looks like it's computed twice for children
             if record.duplicate_id:  # would like to avoid to add state as a depends only for this.
                 record.global_result = record.duplicate_id.global_result
-            elif not record.local_result:
+            elif record.local_result and record._get_result_score(record.local_result) >= record._get_result_score('ko'):
                 record.global_result = record.local_result
-            elif record._get_result_score(record.local_result) >= record._get_result_score('ko'):
-                record.global_result = record.local_result
-            elif record.children_ids:
-                children_result = record._get_worst_result([child.global_result for child in record.children_ids], max_res='ko')
-                record.global_result = record._get_worst_result([record.local_result, children_result])
             else:
-                record.global_result = record.local_result
+                children_ids = [child for child in record.children_ids if not child.orphan_result]
+                if children_ids:
+                    children_result = record._get_worst_result([child.global_result for child in children_ids], max_res='ko')
+                    if record.local_result:
+                        record.global_result = record._get_worst_result([record.local_result, children_result])
+                    else:
+                        record.global_result = children_result
+                else:
+                    record.global_result = record.local_result
 
     def _get_worst_result(self, results, max_res=False):
         results = [result for result in results if result]  # filter Falsy values
diff --git a/runbot/models/build_config.py b/runbot/models/build_config.py
index abb17455..b8f88a30 100644
--- a/runbot/models/build_config.py
+++ b/runbot/models/build_config.py
@@ -111,6 +111,7 @@ class ConfigStep(models.Model):
     hide_build = fields.Boolean('Hide created build in frontend', default=True, tracking=True)
     force_build = fields.Boolean("As a forced rebuild, don't use duplicate detection", default=False, tracking=True)
     force_host = fields.Boolean('Use same host as parent for children', default=False, tracking=True)  # future
+    make_orphan = fields.Boolean('No effect on the parent result', help='Created build result will not affect parent build result', default=False, tracking=True)
 
     @api.constrains('python_code')
     def _check_python_code(self):
@@ -205,6 +206,7 @@ class ConfigStep(models.Model):
                     'subject': build.subject,
                     'modules': build.modules,
                     'hidden': self.hide_build,
+                    'orphan_result': self.make_orphan,
                 })
                 build._log('create_build', 'created with config %s' % create_config.name, log_type='subbuild', path=str(children.id))
 
diff --git a/runbot/templates/build.xml b/runbot/templates/build.xml
index e78d146f..344ef07d 100644
--- a/runbot/templates/build.xml
+++ b/runbot/templates/build.xml
@@ -215,6 +215,7 @@
                                   <tr><td t-attf-class="{{rowclass}}">
                                     <a t-attf-href="/runbot/build/{{child.id}}" >Build <t t-esc="child.id"/></a> 
                                     with config <a t-attf-href="/web#id={{child.config_id.id}}&amp;view_type=form&amp;model=runbot.build.config"><t t-esc="child.config_id.name"/></a>
+                                    <t t-if="child.orphan_result"><i class="fa fa-chain-broken" title="Build result ignored for parent" /></t>
                                     <t t-if="child.job"> Running step: <t t-esc="child.job"/></t>
                                     <t t-if="child.global_state in ['testing', 'waiting']">
                                       <i class="fa fa-spinner fa-spin"/>
@@ -228,7 +229,8 @@
                             </td>
                           </tr>
                         </table> 
-                        <p t-if="build.parent_id">Child of <a t-attf-href="/runbot/build/#{build.parent_id.id}"><t t-esc="build.parent_id.dest"/></a></p>
+                        <p t-if="build.parent_id">Child of <a t-attf-href="/runbot/build/#{build.parent_id.id}"><t t-esc="build.parent_id.dest"/></a>
+                        <t t-if="build.orphan_result">&amp;nbsp;<i class="fa fa-chain-broken" title="Build result ignored for parent" />&amp;nbsp;Orphaned build, the result does not affect parent build result</t></p>
                         <p t-if="build.duplicate_id">Duplicate of <a t-attf-href="/runbot/build/#{build.duplicate_id.id}"><t t-esc="build.duplicate_id.dest"/></a></p>
                         <table class="table table-condensed table-striped">
                         <tr>
diff --git a/runbot/tests/__init__.py b/runbot/tests/__init__.py
index 0df5e53e..dd011f06 100644
--- a/runbot/tests/__init__.py
+++ b/runbot/tests/__init__.py
@@ -4,3 +4,4 @@ from . import test_build
 from . import test_frontend
 from . import test_schedule
 from . import test_cron
+from . import test_build_config_step
diff --git a/runbot/tests/test_build_config_step.py b/runbot/tests/test_build_config_step.py
new file mode 100644
index 00000000..9dbf151f
--- /dev/null
+++ b/runbot/tests/test_build_config_step.py
@@ -0,0 +1,81 @@
+# -*- coding: utf-8 -*-
+from odoo.tests import common
+
+
+class TestBuildConfigStep(common.TransactionCase):
+
+    def setUp(self):
+        super(TestBuildConfigStep, self).setUp()
+        self.Repo = self.env['runbot.repo']
+        self.repo = self.Repo.create({'name': 'bla@example.com:foo/bar'})
+        self.Branch = self.env['runbot.branch']
+        self.branch = self.Branch.create({
+            'repo_id': self.repo.id,
+            'name': 'refs/heads/master'
+        })
+        self.branch_10 = self.Branch.create({
+            'repo_id': self.repo.id,
+            'name': 'refs/heads/10.0'
+        })
+        self.branch_11 = self.Branch.create({
+            'repo_id': self.repo.id,
+            'name': 'refs/heads/11.0'
+        })
+        self.Build = self.env['runbot.build']
+        self.ConfigStep = self.env['runbot.build.config.step']
+        self.Config = self.env['runbot.build.config']
+
+        self.parent_build = self.Build.create({
+            'branch_id': self.branch.id,
+            'name': 'd0d0caca0000ffffffffffffffffffffffffffff',
+            'port': '1234',
+        })
+
+    def test_config_step_create_results(self):
+        """ Test child builds are taken into account"""
+
+        config_step = self.ConfigStep.create({
+            'name': 'test_step',
+            'job_type': 'create_build',
+            'number_builds': 2,
+            'make_orphan': False,
+            'force_build': True,
+        })
+
+        config = self.Config.create({'name': 'test_config'})
+        config_step.create_config_ids = [config.id]
+
+        config_step._create_build(self.parent_build, '/tmp/essai')
+        self.assertEqual(len(self.parent_build.children_ids), 2, 'Two sub-builds should have been generated')
+
+        # check that the result will be ignored by parent build
+        for child_build in self.parent_build.children_ids:
+            self.assertFalse(child_build.orphan_result)
+            child_build.local_result = 'ko'
+            self.assertEqual(child_build.global_result, 'ko')
+
+        self.assertEqual(self.parent_build.global_result, 'ko')
+
+    def test_config_step_create(self):
+        """ Test the config step of type create """
+
+        config_step = self.ConfigStep.create({
+            'name': 'test_step',
+            'job_type': 'create_build',
+            'number_builds': 2,
+            'make_orphan': True,
+            'force_build': True,
+        })
+
+        config = self.Config.create({'name': 'test_config'})
+        config_step.create_config_ids = [config.id]
+
+        config_step._create_build(self.parent_build, '/tmp/essai')
+        self.assertEqual(len(self.parent_build.children_ids), 2, 'Two sub-builds should have been generated')
+
+        # check that the result will be ignored by parent build
+        for child_build in self.parent_build.children_ids:
+            self.assertTrue(child_build.orphan_result, 'An orphan result config step should mark the build as orphan_result')
+            child_build.local_result = 'ko'
+
+        self.assertFalse(self.parent_build.global_result)
diff --git a/runbot/views/build_views.xml b/runbot/views/build_views.xml
index 3a3c05e1..39efc9e6 100644
--- a/runbot/views/build_views.xml
+++ b/runbot/views/build_views.xml
@@ -36,6 +36,7 @@
                         <field name="build_type" groups="base.group_no_one"/>
                         <field name="config_id" readonly="1"/>
                         <field name="config_id" groups="base.group_no_one"/>
+                        <field name="orphan_result" readonly="1"/>
                     </group>
                 </sheet>
             </form>
diff --git a/runbot/views/config_views.xml b/runbot/views/config_views.xml
index 9199a1f6..27741c5c 100644
--- a/runbot/views/config_views.xml
+++ b/runbot/views/config_views.xml
@@ -61,6 +61,7 @@
                         <field name="number_builds"/>
                         <field name="hide_build" groups="base.group_no_one"/>
                         <field name="force_build"/>
+                        <field name="make_orphan"/>
                     </group>
                 </sheet>
             </form>