diff --git a/CMakeLists_files.cmake b/CMakeLists_files.cmake
index c8d100823..e650bb71c 100644
--- a/CMakeLists_files.cmake
+++ b/CMakeLists_files.cmake
@@ -74,6 +74,7 @@ if(ENABLE_ECL_INPUT)
     src/opm/parser/eclipse/EclipseState/IOConfig/IOConfig.cpp
     src/opm/parser/eclipse/EclipseState/IOConfig/RestartConfig.cpp
     src/opm/parser/eclipse/EclipseState/Runspec.cpp
+    src/opm/parser/eclipse/EclipseState/Schedule/ActionAST.cpp
     src/opm/parser/eclipse/EclipseState/Schedule/ActionContext.cpp
     src/opm/parser/eclipse/EclipseState/Schedule/Actions.cpp
     src/opm/parser/eclipse/EclipseState/Schedule/ActionX.cpp
@@ -440,6 +441,7 @@ if(ENABLE_ECL_INPUT)
        opm/parser/eclipse/EclipseState/Aquancon.hpp
        opm/parser/eclipse/EclipseState/AquiferCT.hpp
        opm/parser/eclipse/EclipseState/Aquifetp.hpp
+       opm/parser/eclipse/EclipseState/Schedule/ActionAST.hpp
        opm/parser/eclipse/EclipseState/Schedule/ActionContext.hpp
        opm/parser/eclipse/EclipseState/Schedule/Actions.hpp
        opm/parser/eclipse/EclipseState/Schedule/ActionX.hpp
diff --git a/opm/parser/eclipse/EclipseState/Schedule/ActionAST.hpp b/opm/parser/eclipse/EclipseState/Schedule/ActionAST.hpp
new file mode 100644
index 000000000..642986f45
--- /dev/null
+++ b/opm/parser/eclipse/EclipseState/Schedule/ActionAST.hpp
@@ -0,0 +1,141 @@
+/*
+  Copyright 2018 Equinor ASA.
+
+  This file is part of the Open Porous Media project (OPM).
+
+  OPM is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  OPM 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 General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with OPM.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+#ifndef ActionAST_HPP
+#define ActionAST_HPP
+
+#include <string>
+#include <vector>
+
+
+namespace Opm {
+
+class ActionContext;
+
+enum TokenType {
+    number,        //  0
+    ecl_expr,      //  1
+    open_paren,    //  2
+    close_paren,   //  3
+    op_gt,         //  4
+    op_ge,         //  5
+    op_lt,         //  6
+    op_le,         //  7
+    op_eq,         //  8
+    op_ne,         //  9
+    op_and,        // 10
+    op_or,         // 11
+    end,           // 12
+    error          // 13
+};
+
+struct ParseNode {
+    ParseNode(TokenType type, const std::string& value) :
+        type(type),
+        value(value)
+    {}
+
+
+    ParseNode(TokenType type) : ParseNode(type, "")
+    {}
+
+
+    TokenType type;
+    std::string value;
+};
+
+
+class ASTNode {
+public:
+
+ASTNode() :
+    type(TokenType::error)
+{}
+
+
+ASTNode(TokenType type):
+    type(type)
+{}
+
+
+ASTNode(double value) :
+    type(TokenType::number),
+    number(value)
+{}
+
+
+ASTNode(TokenType type, const std::string& func, const std::vector<std::string>& arg_list):
+    type(type),
+    func(func),
+    arg_list(arg_list)
+{}
+
+    bool eval(const ActionContext& context) const;
+    double value(const ActionContext& context) const;
+    TokenType type;
+    void add_child(const ASTNode& child);
+    size_t size() const;
+
+private:
+    std::string func;
+    std::vector<std::string> arg_list;
+    double number;
+
+    /*
+      To have a memmber std::vector<ASTNode> inside the ASTNode class is
+      supposedly borderline undefined behaviour; it compiles without warnings
+      and works. Good for enough for me.
+    */
+    std::vector<ASTNode> children;
+};
+
+
+
+class ActionParser {
+public:
+    ActionParser(const std::vector<std::string>& tokens);
+    TokenType get_type(const std::string& arg) const;
+    ParseNode current() const;
+    ParseNode next();
+    size_t pos() const;
+    void print() const;
+private:
+    const std::vector<std::string>& tokens;
+    ssize_t current_pos = -1;
+};
+
+
+class ActionAST{
+public:
+    ActionAST() = default;
+    explicit ActionAST(const std::vector<std::string>& tokens);
+    ASTNode parse_right(ActionParser& parser);
+    ASTNode parse_left(ActionParser& parser);
+    ASTNode parse_op(ActionParser& parser);
+    ASTNode parse_cmp(ActionParser& parser);
+    ASTNode parse_or(ActionParser& parser);
+    ASTNode parse_and(ActionParser& parser);
+
+    bool eval(const ActionContext& context) const;
+private:
+    ASTNode tree;
+};
+}
+#endif
diff --git a/opm/parser/eclipse/EclipseState/Schedule/ActionContext.hpp b/opm/parser/eclipse/EclipseState/Schedule/ActionContext.hpp
index bb507704a..d82fdf741 100644
--- a/opm/parser/eclipse/EclipseState/Schedule/ActionContext.hpp
+++ b/opm/parser/eclipse/EclipseState/Schedule/ActionContext.hpp
@@ -33,9 +33,14 @@ namespace Opm {
 
 class ActionContext {
 public:
+    ActionContext();
+
     double get(const std::string& func, const std::string& arg) const;
     void   add(const std::string& func, const std::string& arg, double value);
 
+    double get(const std::string& func) const;
+    void   add(const std::string& func, double value);
+
 private:
     std::map<std::string, double> values;
 };
diff --git a/opm/parser/eclipse/EclipseState/Schedule/ActionX.hpp b/opm/parser/eclipse/EclipseState/Schedule/ActionX.hpp
index 1f3b62f2c..d1f8eea92 100644
--- a/opm/parser/eclipse/EclipseState/Schedule/ActionX.hpp
+++ b/opm/parser/eclipse/EclipseState/Schedule/ActionX.hpp
@@ -26,6 +26,7 @@
 #include <ctime>
 
 #include <opm/parser/eclipse/Deck/DeckKeyword.hpp>
+#include <opm/parser/eclipse/EclipseState/Schedule/ActionAST.hpp>
 
 namespace Opm {
 /*
@@ -78,6 +79,7 @@ private:
     std::time_t m_start_time;
 
     std::vector<DeckKeyword> keywords;
+    ActionAST ast;
     size_t run_count = 0;
     std::time_t last_run = 0;
 };
diff --git a/src/opm/parser/eclipse/EclipseState/Schedule/ActionAST.cpp b/src/opm/parser/eclipse/EclipseState/Schedule/ActionAST.cpp
new file mode 100644
index 000000000..a9ec63bcb
--- /dev/null
+++ b/src/opm/parser/eclipse/EclipseState/Schedule/ActionAST.cpp
@@ -0,0 +1,337 @@
+/*
+  Copyright 2018 Equinor ASA.
+
+  This file is part of the Open Porous Media project (OPM).
+
+  OPM is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  OPM 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 General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with OPM.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <vector>
+#include <string>
+#include <algorithm>
+#include <cstring>
+
+#include <opm/parser/eclipse/EclipseState/Schedule/ActionAST.hpp>
+#include <opm/parser/eclipse/EclipseState/Schedule/ActionContext.hpp>
+
+namespace Opm {
+
+ActionParser::ActionParser(const std::vector<std::string>& tokens) :
+    tokens(tokens)
+{}
+
+
+TokenType ActionParser::get_type(const std::string& arg) const {
+    std::string lower_arg = arg;
+    std::for_each(lower_arg.begin(),
+                  lower_arg.end(),
+                  [](char& c) {
+                      c = std::tolower(static_cast<unsigned char>(c));
+                  });
+
+    if (lower_arg == "and")
+        return TokenType::op_and;
+
+    if (lower_arg == "or")
+        return TokenType::op_or;
+
+    if (lower_arg == "(")
+        return TokenType::open_paren;
+
+    if (lower_arg == ")")
+        return TokenType::close_paren;
+
+    if (lower_arg == ">" || lower_arg == ".gt.")
+        return TokenType::op_gt;
+
+    if (lower_arg == ">=" || lower_arg == ".ge.")
+        return TokenType::op_ge;
+
+    if (lower_arg == "<=" || lower_arg == ".le.")
+        return TokenType::op_le;
+
+    if (lower_arg == "<" || lower_arg == ".lt.")
+        return TokenType::op_lt;
+
+    if (lower_arg == "<=" || lower_arg == ".le.")
+        return TokenType::op_le;
+
+    if (lower_arg == "=" || lower_arg == ".eq.")
+        return TokenType::op_eq;
+
+    if (lower_arg == "!=" || lower_arg == ".ne.")
+        return TokenType::op_ne;
+
+    {
+        char * end_ptr;
+        strtod(lower_arg.c_str(), &end_ptr);
+        if (std::strlen(end_ptr) == 0)
+            return TokenType::number;
+    }
+
+    return TokenType::ecl_expr;
+}
+
+ParseNode ActionParser::next() {
+    this->current_pos++;
+    if (static_cast<size_t>(this->current_pos) == this->tokens.size())
+        return TokenType::end;
+
+    std::string arg = this->tokens[this->current_pos];
+    return ParseNode(get_type(arg), arg);
+}
+
+
+ParseNode ActionParser::current() const {
+    if (static_cast<size_t>(this->current_pos) == this->tokens.size())
+        return TokenType::end;
+
+    std::string arg = this->tokens[this->current_pos];
+    return ParseNode(get_type(arg), arg);
+}
+
+
+size_t ActionParser::pos() const {
+    return this->current_pos;
+}
+
+/*****************************************************************/
+
+void ASTNode::add_child(const ASTNode& child) {
+    this->children.push_back(child);
+}
+
+double ASTNode::value(const ActionContext& context) const {
+    if (this->children.size() != 0)
+        throw std::invalid_argument("value() method should only reach leafnodes");
+
+    if (this->type == TokenType::number)
+        return this->number;
+
+    if (this->arg_list.size() == 0)
+        return context.get(this->func);
+    else {
+        std::string arg_key = this->arg_list[0];
+        for (size_t index = 1; index < this->arg_list.size(); index++)
+            arg_key += ":" + this->arg_list[index];
+        return context.get(this->func, arg_key);
+    }
+}
+
+
+bool ASTNode::eval(const ActionContext& context) const {
+    if (this->children.size() == 0)
+        throw std::invalid_argument("bool eval should not reach leafnodes");
+
+    if (this->type == TokenType::op_or || this->type == TokenType::op_and) {
+        bool value = (this->type == TokenType::op_and);
+        for (const auto& child : this->children) {
+            if (this->type == TokenType::op_or)
+                value = value || child.eval(context);
+            else
+                value = value && child.eval(context);
+        }
+        return value;
+    }
+
+    double v1 = this->children[0].value(context);
+    double v2 = this->children[1].value(context);
+
+    switch (this->type) {
+
+    case TokenType::op_eq:
+        return v1 == v2;
+
+    case TokenType::op_ge:
+        return v1 >= v2;
+
+    case TokenType::op_le:
+        return v1 <= v2;
+
+    case TokenType::op_ne:
+        return v1 != v2;
+
+    case TokenType::op_gt:
+        return v1 > v2;
+
+    case TokenType::op_lt:
+        return v1 < v2;
+
+    default:
+        throw std::invalid_argument("Incorrect operator type - expected comparison");
+    }
+}
+
+
+size_t ASTNode::size() const {
+    return this->children.size();
+}
+
+
+/*****************************************************************/
+
+ASTNode ActionAST::parse_left(ActionParser& parser) {
+    auto current = parser.current();
+    if (current.type != TokenType::ecl_expr)
+        return TokenType::error;
+
+    std::string func = current.value;
+    std::vector<std::string> arg_list;
+    current = parser.next();
+    while (current.type == TokenType::ecl_expr || current.type == TokenType::number) {
+        arg_list.push_back(current.value);
+        current = parser.next();
+    }
+
+    return ASTNode(TokenType::ecl_expr, func, arg_list);
+}
+
+ASTNode ActionAST::parse_op(ActionParser& parser) {
+    auto current = parser.current();
+    if (current.type == TokenType::op_gt ||
+        current.type == TokenType::op_ge ||
+        current.type == TokenType::op_lt ||
+        current.type == TokenType::op_le ||
+        current.type == TokenType::op_eq ||
+        current.type == TokenType::op_ne) {
+        parser.next();
+        return current.type;
+    }
+    return TokenType::error;
+}
+
+
+ASTNode ActionAST::parse_right(ActionParser& parser) {
+    auto current = parser.current();
+    if (current.type == TokenType::number) {
+        parser.next();
+        return ASTNode( strtod(current.value.c_str(), nullptr) );
+    }
+
+    current = parser.current();
+    if (current.type != TokenType::ecl_expr)
+        return TokenType::error;
+
+    std::string func = current.value;
+    std::vector<std::string> arg_list;
+    current = parser.next();
+    while (current.type == TokenType::ecl_expr || current.type == TokenType::number) {
+        arg_list.push_back(current.value);
+        current = parser.next();
+    }
+    return ASTNode(TokenType::ecl_expr, func, arg_list);
+}
+
+
+
+ASTNode ActionAST::parse_cmp(ActionParser& parser) {
+    auto current = parser.current();
+
+    if (current.type == TokenType::open_paren) {
+        parser.next();
+        auto inner_expr = this->parse_or(parser);
+
+        current = parser.current();
+        if (current.type != TokenType::close_paren)
+            return TokenType::error;
+
+        parser.next();
+        return inner_expr;
+    } else {
+        auto left_node = parse_left(parser);
+        if (left_node.type == TokenType::error)
+            return TokenType::error;
+
+        auto op_node = parse_op(parser);
+        if (op_node.type == TokenType::error)
+            return TokenType::error;
+
+        auto right_node = parse_right(parser);
+        if (right_node.type == TokenType::error)
+            return TokenType::error;
+
+        op_node.add_child(left_node);
+        op_node.add_child(right_node);
+        return op_node;
+    }
+}
+
+ASTNode ActionAST::parse_and(ActionParser& parser) {
+    auto left = this->parse_cmp(parser);
+    if (left.type == TokenType::error)
+        return TokenType::error;
+
+    auto current = parser.current();
+    if (current.type == TokenType::op_and) {
+        ASTNode and_node(TokenType::op_and);
+        and_node.add_child(left);
+
+        while (parser.current().type == TokenType::op_and) {
+            parser.next();
+            auto next_cmp = this->parse_cmp(parser);
+            if (next_cmp.type == TokenType::error)
+                return TokenType::error;
+
+            and_node.add_child(next_cmp);
+        }
+        return and_node;
+    }
+
+    return left;
+}
+
+
+ASTNode ActionAST::parse_or(ActionParser& parser) {
+    auto left = this->parse_and(parser);
+    if (left.type == TokenType::error)
+        return TokenType::error;
+
+    auto current = parser.current();
+    if (current.type == TokenType::op_or) {
+        ASTNode or_node(TokenType::op_or);
+        or_node.add_child(left);
+
+        while (parser.current().type == TokenType::op_or) {
+            parser.next();
+            auto next_cmp = this->parse_or(parser);
+            if (next_cmp.type == TokenType::error)
+                return TokenType::error;
+
+            or_node.add_child(next_cmp);
+        }
+        return or_node;
+    }
+
+    return left;
+}
+
+ActionAST::ActionAST(const std::vector<std::string>& tokens) {
+    ActionParser parser(tokens);
+    auto current = parser.next();
+    this->tree = this->parse_or(parser);
+    current = parser.current();
+    if (current.type != TokenType::end) {
+        size_t index = parser.pos();
+        throw std::invalid_argument("Extra unhandled data starting with token[" + std::to_string(index) + "] = " + current.value);
+    }
+
+    if (this->tree.type == TokenType::error)
+        throw std::invalid_argument("Failed to parse");
+}
+
+bool ActionAST::eval(const ActionContext& context) const {
+    return this->tree.eval(context);
+}
+
+}
diff --git a/src/opm/parser/eclipse/EclipseState/Schedule/ActionContext.cpp b/src/opm/parser/eclipse/EclipseState/Schedule/ActionContext.cpp
index d13bcd9e0..25a69b953 100644
--- a/src/opm/parser/eclipse/EclipseState/Schedule/ActionContext.cpp
+++ b/src/opm/parser/eclipse/EclipseState/Schedule/ActionContext.cpp
@@ -18,15 +18,28 @@
 */
 
 #include <opm/parser/eclipse/EclipseState/Schedule/ActionContext.hpp>
+#include <opm/parser/eclipse/EclipseState/Schedule/TimeMap.hpp>
 
 namespace Opm {
 
+    ActionContext::ActionContext() {
+        for (const auto& pair : TimeMap::eclipseMonthIndices())
+            this->add(pair.first, pair.second);
+    }
+
     void ActionContext::add(const std::string& func, const std::string& arg, double value) {
         this->values[func + ":" + arg] = value;
     }
 
+    void ActionContext::add(const std::string& func, double value) {
+        this->values[func] = value;
+    }
 
     double ActionContext::get(const std::string& func, const std::string& arg) const {
         return this->values.at( func + ":" + arg );
     }
+
+    double ActionContext::get(const std::string& func) const {
+        return this->values.at( func );
+    }
 }
diff --git a/src/opm/parser/eclipse/EclipseState/Schedule/ActionX.cpp b/src/opm/parser/eclipse/EclipseState/Schedule/ActionX.cpp
index 070455461..561a8d3b7 100644
--- a/src/opm/parser/eclipse/EclipseState/Schedule/ActionX.cpp
+++ b/src/opm/parser/eclipse/EclipseState/Schedule/ActionX.cpp
@@ -45,7 +45,15 @@ ActionX::ActionX(const DeckRecord& record, std::time_t start_time) :
 
 ActionX::ActionX(const DeckKeyword& kw, std::time_t start_time) :
     ActionX(kw.getRecord(0), start_time)
-{}
+{
+    std::vector<std::string> tokens;
+    for (size_t record_index = 1; record_index < kw.size(); record_index++) {
+        const auto& record = kw.getRecord(record_index);
+        for (const auto& token : record.getItem("CONDITION").getData<std::string>())
+            tokens.push_back(token);
+    }
+    this->ast = ActionAST(tokens);
+}
 
 
 void ActionX::addKeyword(const DeckKeyword& kw) {
diff --git a/tests/parser/ACTIONX.cpp b/tests/parser/ACTIONX.cpp
index 94560990f..44c06ff25 100644
--- a/tests/parser/ACTIONX.cpp
+++ b/tests/parser/ACTIONX.cpp
@@ -30,6 +30,7 @@
 
 #include <opm/parser/eclipse/EclipseState/Grid/EclipseGrid.hpp>
 #include <opm/parser/eclipse/EclipseState/Schedule/Schedule.hpp>
+#include <opm/parser/eclipse/EclipseState/Schedule/ActionAST.hpp>
 #include <opm/parser/eclipse/EclipseState/Schedule/ActionContext.hpp>
 #include <opm/parser/eclipse/EclipseState/Schedule/Actions.hpp>
 #include <opm/parser/eclipse/EclipseState/Schedule/ActionX.hpp>
@@ -198,3 +199,251 @@ BOOST_AUTO_TEST_CASE(TestContext) {
     context.add("FUNC", "ARG", 100);
     BOOST_CHECK_EQUAL(context.get("FUNC", "ARG"), 100);
 }
+
+
+
+Opm::Schedule make_action(const std::string& action_string) {
+    std::string start = std::string{ R"(
+SCHEDULE
+)"};
+    std::string end = std::string{ R"(
+ENDACTIO
+
+TSTEP
+   10 /
+)"};
+
+    std::string deck_string = start + action_string + end;
+    Opm::Parser parser;
+    auto deck = parser.parseString(deck_string, Opm::ParseContext());
+    EclipseGrid grid1(10,10,10);
+    TableManager table ( deck );
+    Eclipse3DProperties eclipseProperties ( deck , table, grid1);
+    Runspec runspec(deck);
+
+    return Schedule(deck, grid1, eclipseProperties, runspec, ParseContext());
+}
+
+
+BOOST_AUTO_TEST_CASE(TestActionAST_BASIC) {
+    // Missing comparator
+    BOOST_REQUIRE_THROW( ActionAST( {"WWCT", "OPX", "0.75"} ), std::invalid_argument);
+
+    // Left hand side must be function expression
+    BOOST_REQUIRE_THROW( ActionAST({"0.75", "<", "1.0"}), std::invalid_argument);
+
+    //Extra data
+    BOOST_REQUIRE_THROW(ActionAST({"0.75", "<", "1.0", "EXTRA"}), std::invalid_argument);
+
+    ActionAST ast1({"WWCT", "OPX", ">", "0.75"});
+    ActionAST ast2({"WWCT", "OPX", "=", "WWCT", "OPX"});
+    ActionAST ast3({"WWCT", "OPY", ">", "0.75"});
+    ActionContext context;
+
+    context.add("WWCT", "OPX", 100);
+    BOOST_CHECK(ast1.eval(context));
+
+    context.add("WWCT", "OPX", -100);
+    BOOST_CHECK(!ast1.eval(context));
+
+    BOOST_CHECK(ast2.eval(context));
+    BOOST_REQUIRE_THROW(ast3.eval(context), std::out_of_range);
+}
+
+BOOST_AUTO_TEST_CASE(TestActionAST_OR_AND) {
+    ActionAST ast_or({"WWCT", "OPX", ">", "0.75", "OR", "WWCT", "OPY", ">", "0.75"});
+    ActionAST ast_and({"WWCT", "OPX", ">", "0.75", "AND", "WWCT", "OPY", ">", "0.75"});
+    ActionAST par({"WWCT", "OPX", ">", "0.75", "AND", "(", "WWCT", "OPY", ">", "0.75", "OR", "WWCT", "OPZ", ">", "0.75", ")"});
+    ActionContext context;
+
+    context.add("WWCT", "OPX", 100);
+    context.add("WWCT", "OPY", -100);
+    context.add("WWCT", "OPZ", 100);
+    BOOST_CHECK( ast_or.eval(context) );
+    BOOST_CHECK( !ast_and.eval(context) );
+    BOOST_CHECK( par.eval(context));
+
+
+    context.add("WWCT", "OPX", -100);
+    context.add("WWCT", "OPY", 100);
+    context.add("WWCT", "OPZ", 100);
+    BOOST_CHECK( ast_or.eval(context) );
+    BOOST_CHECK( !ast_and.eval(context) );
+    BOOST_CHECK( !par.eval(context));
+
+
+    context.add("WWCT", "OPX", 100);
+    context.add("WWCT", "OPY", 100);
+    context.add("WWCT", "OPZ", -100);
+    BOOST_CHECK( ast_or.eval(context) );
+    BOOST_CHECK( ast_and.eval(context) );
+    BOOST_CHECK( par.eval(context));
+
+    context.add("WWCT", "OPX", -100);
+    context.add("WWCT", "OPY", -100);
+    context.add("WWCT", "OPZ", -100);
+    BOOST_CHECK( !ast_or.eval(context) );
+    BOOST_CHECK( !ast_and.eval(context) );
+    BOOST_CHECK( !par.eval(context));
+}
+
+BOOST_AUTO_TEST_CASE(DATE) {
+    ActionAST ast({"MNTH", ">=", "JUN"});
+    ActionContext context;
+    context.add("MNTH", 6);
+    BOOST_CHECK( ast.eval(context) );
+
+    context.add("MNTH", 8);
+    BOOST_CHECK( ast.eval(context) );
+
+    context.add("MNTH", 5);
+    BOOST_CHECK( !ast.eval(context) );
+}
+
+
+BOOST_AUTO_TEST_CASE(MANUAL1) {
+    ActionAST ast({"GGPR", "FIELD", ">", "50000", "AND", "WGOR", "PR", ">" ,"GGOR", "FIELD"});
+    ActionContext context;
+
+    context.add("GGPR", "FIELD", 60000 );
+    context.add("WGOR", "PR" , 300 );
+    context.add("GGOR", "FIELD", 200);
+    BOOST_CHECK( ast.eval(context) );
+
+    context.add("GGPR", "FIELD", 0 );
+    context.add("WGOR", "PR" , 300 );
+    context.add("GGOR", "FIELD", 200);
+    BOOST_CHECK( !ast.eval(context) );
+
+    context.add("GGPR", "FIELD", 60000 );
+    context.add("WGOR", "PR" , 100 );
+    context.add("GGOR", "FIELD", 200);
+    BOOST_CHECK( !ast.eval(context) );
+}
+
+BOOST_AUTO_TEST_CASE(MANUAL2) {
+    ActionAST ast({"GWCT", "LIST1", ">", "0.70", "AND", "(", "GWPR", "LIST1", ">", "GWPR", "LIST2", "OR", "GWPR", "LIST1", ">", "GWPR", "LIST3", ")"});
+    ActionContext context;
+
+    context.add("GWCT", "LIST1", 1.0);
+    context.add("GWPR", "LIST1", 1 );
+    context.add("GWPR", "LIST2", 2 );
+    context.add("GWPR", "LIST3", 3 );
+    BOOST_CHECK( !ast.eval(context));
+
+    context.add("GWCT", "LIST1", 1.0);
+    context.add("GWPR", "LIST1", 1 );
+    context.add("GWPR", "LIST2", 2 );
+    context.add("GWPR", "LIST3", 0 );
+    BOOST_CHECK( ast.eval(context));
+
+    context.add("GWCT", "LIST1", 1.0);
+    context.add("GWPR", "LIST1", 1 );
+    context.add("GWPR", "LIST2", 0 );
+    context.add("GWPR", "LIST3", 3 );
+    BOOST_CHECK( ast.eval(context));
+
+    context.add("GWCT", "LIST1", 1.0);
+    context.add("GWPR", "LIST1", 1 );
+    context.add("GWPR", "LIST2", 0 );
+    context.add("GWPR", "LIST3", 0 );
+    BOOST_CHECK( ast.eval(context));
+
+    context.add("GWCT", "LIST1", 0.0);
+    context.add("GWPR", "LIST1", 1 );
+    context.add("GWPR", "LIST2", 0 );
+    context.add("GWPR", "LIST3", 3 );
+    BOOST_CHECK( !ast.eval(context));
+}
+
+BOOST_AUTO_TEST_CASE(MANUAL3) {
+    ActionAST ast({"MNTH", ".GE.", "MAR", "AND", "MNTH", ".LE.", "OCT", "AND", "GMWL", "HIGH", ".GE.", "4"});
+    ActionContext context;
+
+    context.add("MNTH", 4);
+    context.add("GMWL", "HIGH", 4);
+    BOOST_CHECK( ast.eval(context));
+
+    context.add("MNTH", 3);
+    context.add("GMWL", "HIGH", 4);
+    BOOST_CHECK( ast.eval(context));
+
+    context.add("MNTH", 11);
+    context.add("GMWL", "HIGH", 4);
+    BOOST_CHECK( !ast.eval(context));
+
+    context.add("MNTH", 3);
+    context.add("GMWL", "HIGH", 3);
+    BOOST_CHECK( !ast.eval(context));
+}
+
+
+BOOST_AUTO_TEST_CASE(MANUAL4) {
+    ActionAST ast({"GWCT", "FIELD", ">", "0.8", "AND", "DAY", ">", "1", "AND", "MNTH", ">", "JUN", "AND", "YEAR", ">=", "2021"});
+    ActionContext context;
+
+
+    context.add("MNTH", 7);
+    context.add("DAY", 2);
+    context.add("YEAR", 2030);
+    context.add("GWCT", "FIELD", 1.0);
+    BOOST_CHECK( ast.eval(context) );
+
+    context.add("MNTH", 7);
+    context.add("DAY", 2);
+    context.add("YEAR", 2019);
+    context.add("GWCT", "FIELD", 1.0);
+    BOOST_CHECK( !ast.eval(context) );
+}
+
+
+
+BOOST_AUTO_TEST_CASE(MANUAL5) {
+    ActionAST ast({"WCG2", "PROD1", ">", "WCG5", "PROD2", "AND", "GCG3", "G1", ">", "GCG7", "G2", "OR", "FCG1", ">", "FCG7"});
+    ActionContext context;
+
+    context.add("WCG2", "PROD1", 100);
+    context.add("WCG5", "PROD2",  50);
+    context.add("GCG3", "G1", 200);
+    context.add("GCG7", "G2", 100);
+    context.add("FCG1", 100);
+    context.add("FCG7",  50);
+    BOOST_CHECK(ast.eval(context));
+
+    context.add("WCG2", "PROD1", 100);
+    context.add("WCG5", "PROD2",  50);
+    context.add("GCG3", "G1", 200);
+    context.add("GCG7", "G2", 100);
+    context.add("FCG1", 100);
+    context.add("FCG7", 150);
+    BOOST_CHECK(ast.eval(context));
+
+    context.add("WCG2", "PROD1", 100);
+    context.add("WCG5", "PROD2",  50);
+    context.add("GCG3", "G1", 20);
+    context.add("GCG7", "G2", 100);
+    context.add("FCG1", 100);
+    context.add("FCG7", 150);
+    BOOST_CHECK(!ast.eval(context));
+
+    context.add("WCG2", "PROD1", 100);
+    context.add("WCG5", "PROD2",  50);
+    context.add("GCG3", "G1", 20);
+    context.add("GCG7", "G2", 100);
+    context.add("FCG1", 200);
+    context.add("FCG7", 150);
+    BOOST_CHECK(ast.eval(context));
+}
+
+
+
+BOOST_AUTO_TEST_CASE(LGR) {
+    ActionAST ast({"LWCC" , "OPX", "LOCAL", "1", "2", "3", ">", "100"});
+    ActionContext context;
+
+    context.add("LWCC", "OPX:LOCAL:1:2:3", 200);
+    BOOST_CHECK(ast.eval(context));
+
+    context.add("LWCC", "OPX:LOCAL:1:2:3", 20);
+    BOOST_CHECK(!ast.eval(context));
+}