Related:

• Engineering: "How will this work?" Science: "Why will this work?
  Management: "When will this work?" Liberal Arts: "Do you want fries with that?...
• Enhancement breaking what you did right and getting paid for it [see also
  maintenance] -- Glossary of Software Engineering Term...
• Maintenance fixing what you did wrong and getting paid for it [see also
  enhancement] -- Glossary of Software Engineering Term...