Schedule Update
  Update schedule prior to each review or report.
  Indicate date of review by a vertical colored line.
  Change symbol “oo” to “XX” for each item or partial item
    that has been completed.  A four week timeline will look like
    “XXXXoooo” if 50 percent complete.
  Append “ss” to last “oo” in a line to indicate a schedule slip.
    i.e.  “XXooooss”