Many fast$-$food restaurants compete on lean business practices. Match each of the following activities at a fast$-$food restaurant with the lean business concept it strives to achieve. Some activities might relate to more than one lean business concept.

$\backslash$table$[[1.$ Orders filled within three minutes$],[2.$ Food delivered daily by suppliers$],[3.$ Courteous employees$],[4.$ Updated menu items$],[5.$ Employees trained in food safety techniques$],[6.$ Online ordering$]]$