diff --git a/maven-core/src/main/java/org/apache/maven/lifecycle/LifecycleExecutor.java b/maven-core/src/main/java/org/apache/maven/lifecycle/LifecycleExecutor.java
index 6e5abc98fa..2eff10be35 100644
--- a/maven-core/src/main/java/org/apache/maven/lifecycle/LifecycleExecutor.java
+++ b/maven-core/src/main/java/org/apache/maven/lifecycle/LifecycleExecutor.java
@@ -23,6 +23,14 @@ import java.util.Set;
 
 import org.apache.maven.execution.MavenSession;
 import org.apache.maven.model.Plugin;
+import org.apache.maven.plugin.InvalidPluginDescriptorException;
+import org.apache.maven.plugin.MojoNotFoundException;
+import org.apache.maven.plugin.PluginDescriptorParsingException;
+import org.apache.maven.plugin.PluginManagerException;
+import org.apache.maven.plugin.PluginNotFoundException;
+import org.apache.maven.plugin.PluginResolutionException;
+import org.apache.maven.plugin.prefix.NoPluginFoundForPrefixException;
+import org.apache.maven.plugin.version.PluginVersionResolutionException;
 
 /**
  * @author Jason van  Zyl
@@ -49,6 +57,12 @@ public interface LifecycleExecutor
      */
     Set<Plugin> getPluginsBoundByDefaultToAllLifecycles( String packaging );
 
+    MavenExecutionPlan calculateExecutionPlan( MavenSession session, String... tasks )
+        throws PluginNotFoundException, PluginResolutionException, PluginDescriptorParsingException,
+        MojoNotFoundException, NoPluginFoundForPrefixException, InvalidPluginDescriptorException,
+        PluginManagerException, LifecyclePhaseNotFoundException, LifecycleNotFoundException,
+        PluginVersionResolutionException;
+
     void execute( MavenSession session );
 
 }