diff --git a/addons/web/static/src/js/data.js b/addons/web/static/src/js/data.js
index 27d4562aafb..55e200a205f 100644
--- a/addons/web/static/src/js/data.js
+++ b/addons/web/static/src/js/data.js
@@ -1190,6 +1190,46 @@ openerp.web.CompoundDomain = openerp.web.Class.extend({
         return this.__eval_context;
     }
 });
+
+openerp.web.DropMisordered = openerp.web.Class.extend(/** @lends openerp.web.DropMisordered# */{
+    /**
+     * @constructs openerp.web.DropMisordered
+     * @extends openerp.web.Class
+     *
+     * @param {Boolean} [failMisordered=false] whether mis-ordered responses should be failed or just ignored
+     */
+    init: function (failMisordered) {
+        // local sequence number, for requests sent
+        this.lsn = 0;
+        // remote sequence number, seqnum of last received request
+        this.rsn = -1;
+        this.failMisordered = failMisordered || false;
+    },
+    /**
+     * Adds a deferred (usually an async request) to the sequencer
+     *
+     * @param {$.Deferred} deferred to ensure add
+     * @returns {$.Deferred}
+     */
+    add: function (deferred) {
+        var res = $.Deferred();
+
+        var self = this, seq = this.lsn++;
+        deferred.then(function () {
+            if (seq > self.rsn) {
+                self.rsn = seq;
+                res.resolve.apply(res, arguments);
+            } else if (self.failMisordered) {
+                res.reject();
+            }
+        }, function () {
+            res.reject.apply(res, arguments);
+        });
+
+        return res.promise();
+    }
+});
+
 };
 
 // vim:et fdc=0 fdl=0 foldnestmax=3 fdm=syntax:
diff --git a/addons/web/static/test/rpc.js b/addons/web/static/test/rpc.js
new file mode 100644
index 00000000000..7dbd3239abd
--- /dev/null
+++ b/addons/web/static/test/rpc.js
@@ -0,0 +1,130 @@
+$(document).ready(function () {
+    var openerp;
+
+    module('Misordered resolution management', {
+        setup: function () {
+            openerp = window.openerp.init();
+            window.openerp.web.core(openerp);
+            window.openerp.web.data(openerp);
+        }
+    });
+    test('Resolve all correctly ordered, sync', function () {
+        var dm = new openerp.web.DropMisordered(), flag = false;
+
+        var d1 = $.Deferred(), d2 = $.Deferred(),
+            r1 = dm.add(d1), r2 = dm.add(d2);
+
+        $.when(r1, r2).done(function () {
+            flag = true;
+        });
+        d1.resolve();
+        d2.resolve();
+
+        ok(flag);
+    });
+    test("Don't resolve mis-ordered, sync", function () {
+        var dm = new openerp.web.DropMisordered(),
+            done1 = false, done2 = false,
+            fail1 = false, fail2 = false;
+
+        var d1 = $.Deferred(), d2 = $.Deferred();
+        dm.add(d1).then(function () { done1 = true; },
+                        function () { fail1 = true; });
+        dm.add(d2).then(function () { done2 = true; },
+                        function () { fail2 = true; });
+
+        d2.resolve();
+        d1.resolve();
+
+        // d1 is in limbo
+        ok(!done1);
+        ok(!fail1);
+        // d2 is resolved
+        ok(done2);
+        ok(!fail2);
+    });
+    test('Fail mis-ordered flag, sync', function () {
+        var dm = new openerp.web.DropMisordered(true),
+            done1 = false, done2 = false,
+            fail1 = false, fail2 = false;
+
+        var d1 = $.Deferred(), d2 = $.Deferred();
+        dm.add(d1).then(function () { done1 = true; },
+                        function () { fail1 = true; });
+        dm.add(d2).then(function () { done2 = true; },
+                        function () { fail2 = true; });
+
+        d2.resolve();
+        d1.resolve();
+
+        // d1 is failed
+        ok(!done1);
+        ok(fail1);
+        // d2 is resolved
+        ok(done2);
+        ok(!fail2);
+    });
+
+    asyncTest('Resolve all correctly ordered, sync', 1, function () {
+        var dm = new openerp.web.DropMisordered();
+
+        var d1 = $.Deferred(), d2 = $.Deferred(),
+            r1 = dm.add(d1), r2 = dm.add(d2);
+
+        setTimeout(function () { d1.resolve(); }, 100);
+        setTimeout(function () { d2.resolve(); }, 200);
+
+        $.when(r1, r2).done(function () {
+            start();
+            ok(true);
+        });
+    });
+    asyncTest("Don't resolve mis-ordered, sync", 4, function () {
+        var dm = new openerp.web.DropMisordered(),
+            done1 = false, done2 = false,
+            fail1 = false, fail2 = false;
+
+        var d1 = $.Deferred(), d2 = $.Deferred();
+        dm.add(d1).then(function () { done1 = true; },
+                        function () { fail1 = true; });
+        dm.add(d2).then(function () { done2 = true; },
+                        function () { fail2 = true; });
+
+        setTimeout(function () { d1.resolve(); }, 200);
+        setTimeout(function () { d2.resolve(); }, 100);
+
+        setTimeout(function () {
+            start();
+            // d1 is in limbo
+            ok(!done1);
+            ok(!fail1);
+            // d2 is resolved
+            ok(done2);
+            ok(!fail2);
+        }, 400);
+    });
+    asyncTest('Fail mis-ordered flag, sync', 4, function () {
+        var dm = new openerp.web.DropMisordered(true),
+            done1 = false, done2 = false,
+            fail1 = false, fail2 = false;
+
+        var d1 = $.Deferred(), d2 = $.Deferred();
+        dm.add(d1).then(function () { done1 = true; },
+                        function () { fail1 = true; });
+        dm.add(d2).then(function () { done2 = true; },
+                        function () { fail2 = true; });
+
+        setTimeout(function () { d1.resolve(); }, 200);
+        setTimeout(function () { d2.resolve(); }, 100);
+
+        setTimeout(function () {
+            start();
+            // d1 is failed
+            ok(!done1);
+            ok(fail1);
+            // d2 is resolved
+            ok(done2);
+            ok(!fail2);
+        }, 400);
+    });
+});
diff --git a/addons/web/static/test/test.html b/addons/web/static/test/test.html
index 10c2a2c0ed2..004ba0479e1 100644
--- a/addons/web/static/test/test.html
+++ b/addons/web/static/test/test.html
@@ -51,4 +51,5 @@
     <script type="text/javascript" src="/web/static/test/list-utils.js"></script>
     <script type="text/javascript" src="/web/static/test/formats.js"></script>
     <script type="text/javascript" src="/web/static/test/onchange.js"></script>
+    <script type="text/javascript" src="/web/static/test/rpc.js"></script>
 </html>