System maintenance

There is a reason we have a process of change control. It has become a dirty word in some departments, but the bare minimum is:

• making a change in the development environment
• testing it, preferably by more than one person/team
• packaging up the release and labeling it properly
• making a formal request to deploy it, including roll-back instructions

In addition, a precedent should never be set to fix something that another department has broken!