diff --git a/examples/ifcb_experiments.py b/examples/ifcb_experiments.py
index fff13ef..913fdb8 100644
--- a/examples/ifcb_experiments.py
+++ b/examples/ifcb_experiments.py
@@ -6,14 +6,18 @@ from quapy.evaluation import evaluation_report
 def newLR():
     return LogisticRegression(n_jobs=-1)
 
-quantifiers = {'CC':qp.method.aggregative.CC(newLR()),
-               'ACC':qp.method.aggregative.ACC(newLR()),
-               'PCC':qp.method.aggregative.PCC(newLR()),
-               'PACC':qp.method.aggregative.PACC(newLR()),
-               'HDy':qp.method.aggregative.DistributionMatching(newLR()),
-               'EMQ':qp.method.aggregative.EMQ(newLR())}
 
-for quant_name, quantifier in quantifiers.items():
+quantifiers = [
+    ('CC', qp.method.aggregative.CC(newLR())),
+    ('ACC', qp.method.aggregative.ACC(newLR())),
+    ('PCC', qp.method.aggregative.PCC(newLR())),
+    ('PACC', qp.method.aggregative.PACC(newLR())),
+    ('HDy', qp.method.aggregative.DistributionMatching(newLR())),
+    ('EMQ', qp.method.aggregative.EMQ(newLR()))
+]
+
+
+for quant_name, quantifier in quantifiers:
     print("Experiment with "+quant_name)
 
     train, test_gen = qp.datasets.fetch_IFCB()
diff --git a/quapy/data/_ifcb.py b/quapy/data/_ifcb.py
index 87bb030..4eb780d 100644
--- a/quapy/data/_ifcb.py
+++ b/quapy/data/_ifcb.py
@@ -20,6 +20,15 @@ class IFCBTrainSamplesFromDir(AbstractProtocol):
             y = s.iloc[:, 0].to_numpy()
             yield X, y
 
+    def total(self):
+        """
+        Returns the total number of samples that the protocol generates.
+
+        :return: The number of training samples to generate.
+        """
+        return len(self.samples)
+
+
 class IFCBTestSamples(AbstractProtocol):
 
     def __init__(self, path_dir:str, test_prevalences_path: str):
@@ -31,4 +40,12 @@ class IFCBTestSamples(AbstractProtocol):
             #Load the sample from disk
             X = pd.read_csv(os.path.join(self.path_dir,test_sample['sample']+'.csv')).to_numpy()
             prevalences = test_sample.iloc[1:].to_numpy().astype(float)
-            yield X, prevalences
\ No newline at end of file
+            yield X, prevalences
+
+    def total(self):
+        """
+        Returns the total number of samples that the protocol generates.
+
+        :return: The number of test samples to generate.
+        """
+        return len(self.test_prevalences.index)
\ No newline at end of file