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diff --git a/runtimes/neurun/core/include/exec/IExecutor.h b/runtimes/neurun/core/include/exec/IExecutor.h
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+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @file  IExecutor.h
+ * @brief This file defines interface of Executor
+ */
+#ifndef __NEURUN_EXEC_I_EXECUTOR_H_
+#define __NEURUN_EXEC_I_EXECUTOR_H_
+
+#include "model/Model.h"
+#include "IFunction.h"
+#include "IODescription.h"
+#include "model/OperationIndexMap.h"
+
+namespace neurun
+{
+namespace exec
+{
+class IExecutionObserver;
+/**
+ * @brief Struct to define interface of Executor
+ */
+struct IExecutor
+{
+  /**
+   * @brief Construct a new IExecutor object
+   */
+  IExecutor() = default;
+  /**
+   * @brief Destroy the IExecutor object
+   */
+  virtual ~IExecutor() = default;
+
+  /**
+   * @brief Returns model object
+   *
+   * @return Model object
+   */
+  virtual const model::Model &model() = 0;
+
+  /**
+   * @brief     Set an ordering on operations
+   * @param[in] ranks   The table encoding the ordering
+   */
+  virtual void setIndexedRanks(std::shared_ptr<model::OperationIndexMap<int64_t>>) = 0;
+
+  /**
+   * @brief     Start execution
+   * @param[in] desc Input and output description
+   * @note      This method should be thread-safe
+   */
+  virtual void execute(const IODescription &desc) = 0;
+};
+
+} // namespace exec
+} // namespace neurun
+
+#endif // __NEURUN_EXEC_I_EXECUTOR_H_