title: How to wait for previous steps to finish
body: <p>I am designing an ETL with spoon from Pentaho.</p>
  
  <p><img src="https://i.stack.imgur.com/MTX2f.png" alt="ETL Flow"></p>
  
  <p>My purpose is to execute 'Calculate Value' after 'Load To Database' and 'Update Database'.</p>
  
  <p>What step should be used to replace '??? Step wait' ?</p>