One good turn deserves another: yesterday, Erich Friend quoted last week’s “Fail Safe Design” post in his post, “Process Planning—The Hard Way, The Safe Way, The Cost Effective Way.” As some of the things he had to say got me thinking, I figured I would return the favor. Erich wrote: “The battle cry of the Theatre is ‘The Show Must Go On!’ In taking this to heart, we sometimes forge ahead with, a…