diff --git a/UpdatePTUDevCtrl/work_process_list.cpp b/UpdatePTUDevCtrl/work_process_list.cpp
index 5955afc..db099d4 100644
--- a/UpdatePTUDevCtrl/work_process_list.cpp
+++ b/UpdatePTUDevCtrl/work_process_list.cpp
@@ -4,12 +4,12 @@
 #include <limits>
 #include <QDebug>
 
-unsigned WorkList::nextExecIndex() const {
-    if (m_workList.size() > 0 && m_workListIndex < (m_workList.size() - 1)) {
-        return m_workListIndex + 1;
-    }
-    return std::numeric_limits<unsigned>::max();
-}
+//unsigned WorkList::nextExecIndex() const {
+//    if (m_workList.size() > 0 && m_workListIndex < (m_workList.size() - 1)) {
+//        return m_workListIndex + 1;
+//    }
+//    return std::numeric_limits<unsigned>::max();
+//}
 
 bool WorkList::nextExec() const {
     return m_workListIndex < m_workList.size();
@@ -17,12 +17,17 @@ bool WorkList::nextExec() const {
 
 bool WorkList::exec(bool last) {
     if (last == false) {
+        // if not the last entry in the worklist
         if (nextExec()) {
+            // and there is a next entry (a binary) to execute, start the
+            // binary if the specified working directory.
             m_workList[m_workListIndex]->start("/opt/app/tools/atbupdate");
+            // update to point to next entry
             m_workListIndex += 1;
             return true;
         }
     } else {
+        // start the last entry in the worklist
         m_workList.back()->start("/opt/app/tools/atbupdate");
         m_workListIndex = std::numeric_limits<unsigned>::max();
         return true;
diff --git a/UpdatePTUDevCtrl/work_process_list.h b/UpdatePTUDevCtrl/work_process_list.h
index e128a50..ca0b028 100644
--- a/UpdatePTUDevCtrl/work_process_list.h
+++ b/UpdatePTUDevCtrl/work_process_list.h
@@ -5,18 +5,42 @@
 #include <memory>
 
 class UpdateCommand;
+
+
+/**
+ * @brief This class is responsible for calling the several binaries
+ * \ref ATBUpdateTool consists of.
+ *
+ * This class maintains a worklist, which conists of entries of type UpdateCommand.
+ *
+ * @see UpdateCommand
+ */
 class WorkList {
-public:
+    /**
+     * @brief Actual worklist of items to be eecuted.
+     */
     std::vector<std::unique_ptr<UpdateCommand>> m_workList;
+public:
     unsigned m_workListIndex{0};
 
     WorkList() = default;
 
+    /**
+     * \brief Put new work item into worklist.
+     *
+     * \tparam arg Work item to be added to worklist.
+     */
     template<typename T>
     void push_back(T&& arg) {
         m_workList.push_back(std::forward<T>(arg));
     }
 
+    /**
+     * \brief Check if worklist is empty.
+     *
+     * \retval true if worklist is empty.
+     * \retval false otherwise.
+     */
     bool empty() const { return m_workList.empty(); }
 
     // move constructor: pass in classes derived from UpdateCommand
@@ -28,10 +52,30 @@ public:
     //  , m_workListIndex(0) {
     //}
 
-    unsigned nextExecIndex() const;
+    ///**
+    // * \brief Put new work item into worklist.
+    // *
+    // */
+    //unsigned nextExecIndex() const;
+
+    /**
+     * \brief Put new work item into worklist.
+     *
+     */
     bool nextExec() const;
+
+    /**
+     * \brief Put new work item into worklist.
+     *
+     * \param last
+     */
     bool exec(bool last=false);
 
+    /**
+     * \brief Get current size of worklist.
+     *
+     * \retval Current size of worklist.
+     */
     unsigned size() { return m_workList.size(); }
 };