diff --git a/core-writer/include/ProcessManager.hpp b/core-writer/include/ProcessManager.hpp
index 95f153d..9be47ef 100644
--- a/core-writer/include/ProcessManager.hpp
+++ b/core-writer/include/ProcessManager.hpp
@@ -1,12 +1,6 @@
 #ifndef PROCESSMANAGER_H
 #define PROCESSMANAGER_H
 
-#include "WriterUtils.hpp"
-#include "H5Format.hpp"
-#include "RingBuffer.hpp"
-#include "ZmqReceiver.hpp"
-#include <chrono>
-#include "date.h"
 #include "H5WriteModule.hpp"
 #include "ZmqRecvModule.hpp"
 
@@ -21,9 +15,21 @@ class ProcessManager
 
         void start_rest_api(const uint16_t rest_port);
 
+        void start_writing(
+                const std::string output_file,
+                const int n_frames,
+                const int user_id);
+        void stop_writing();
+
+        void start_receiving(
+                const std::string connect_address,
+                const int n_receiving_threads);
+        void stop_receiving();
 
         std::string get_status();
 
+        std::unordered_map<std::string, float> get_statistics();
+
 };
 
 #endif