diff --git a/modules/axelor-open-suite/axelor-qvm/src/main/java/com.axelor/apps.qvm/service/OperationServiceImpl.java b/modules/axelor-open-suite/axelor-qvm/src/main/java/com.axelor/apps.qvm/service/OperationServiceImpl.java
new file mode 100644
index 0000000..0541d6f
--- /dev/null
+++ b/modules/axelor-open-suite/axelor-qvm/src/main/java/com.axelor/apps.qvm/service/OperationServiceImpl.java
@@ -0,0 +1,107 @@
+/*
+ * Axelor Business Solutions
+ *
+ * Copyright (C) 2019 Axelor (<http://axelor.com>).
+ *
+ * This program is free software: you can redistribute it and/or  modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.axelor.apps.qvm.service;
+
+import com.axelor.apps.base.db.Company;
+import com.axelor.apps.base.db.repo.SequenceRepository;
+import com.axelor.apps.base.service.administration.SequenceService;
+import com.axelor.apps.qvm.db.Operation;
+import com.axelor.exception.AxelorException;
+import com.axelor.exception.db.repo.TraceBackRepository;
+import com.axelor.i18n.I18n;
+import com.google.inject.Inject;
+import com.google.inject.persist.Transactional;
+
+public class OperationServiceImpl implements OperationService {
+
+    @Inject
+    protected SequenceService sequenceService;
+
+    @Transactional
+    public Operation createCalibrationSeq(Company company) throws AxelorException {
+
+        Operation calibration = new Operation();
+        calibration.setSerialNumber(this.getCalibrationSequence(company));
+
+        return calibration;
+    }
+
+    @Transactional
+    public Operation createQualificationSeq(Company company) throws AxelorException {
+
+        Operation qualification = new Operation();
+        qualification.setSerialNumber(this.getQualificationSequence(company));
+
+        return qualification;
+    }
+
+    @Transactional
+    public Operation createOperationSeq(Company company) throws AxelorException {
+
+        Operation operation = new Operation();
+        operation.setSerialNumber(this.getOperationSequence(company));
+
+        return operation;
+    }
+
+    public String getCalibrationSequence(Company company) throws AxelorException {
+        String seq = sequenceService.getSequenceNumber(SequenceRepository.CALIB_SEQ, company);
+        if (seq == null) {
+            throw new AxelorException(
+                    company,
+                    TraceBackRepository.CATEGORY_CONFIGURATION_ERROR,
+                    I18n.get("IExceptionMessage.PURCHASE_ORDER_1"),
+                    company.getName());
+        }
+        System.out.println("seq before : " + seq);
+        return seq;
+    }
+
+    public String getQualificationSequence(Company company) throws AxelorException {
+        String seq = sequenceService.getSequenceNumber(SequenceRepository.QUAL_SEQ, company);
+        if (seq == null) {
+            throw new AxelorException(
+                    company,
+                    TraceBackRepository.CATEGORY_CONFIGURATION_ERROR,
+                    I18n.get("IExceptionMessage.PURCHASE_ORDER_1"),
+                    company.getName());
+        }
+        System.out.println("seq before : " + seq);
+        return seq;
+    }
+
+    public String getOperationSequence(Company company) throws AxelorException {
+        String seq = sequenceService.getSequenceNumber(SequenceRepository.OP_SEQ, company);
+        if (seq == null) {
+            throw new AxelorException(
+                    company,
+                    TraceBackRepository.CATEGORY_CONFIGURATION_ERROR,
+                    I18n.get("IExceptionMessage.PURCHASE_ORDER_1"),
+                    company.getName());
+        }
+        System.out.println("seq before : " + seq);
+        return seq;
+    }
+
+    public Operation setMachine(Operation calibration) throws AxelorException {
+        if (calibration.getMachineName() != null) {
+            System.out.println("calibration.getMachineName : " + calibration.getMachineName());
+        }
+        return calibration;
+    }
+}