Design of Experiments Example: A Design with a Fixed Block<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />Guides you through an example of constructing a design with a fixed block. Suppose that you want to study three factors. You can run only three trials per day and you expect substantial day-to-day variation. You need to block your design over multiple days. Also, you want to estimate all two-factor interactions.