production migration guidelines mike mark due created production issues enron mission critical applications since first 2001 following guidelines need adhered several exceptions guidelines houston application environment production migrations 5 days end month development teams moving standard production migration schedule schedule rolled march 2001 removed production access exception 1 2 senior developers per team exceptions production fixes move production today application enhancements formally approved business new applications start phase current processes require intervention order successful processes reviewed order replace future automation houston leads aware guidelines exceptions richard