If you work in a regulated industry (medical, aerospace, auto) you need tracability of all code changes, so even your case 1 needs a ticket reference. Was it a

If you work in a regulated industry (medical, aerospace, auto) you need tracability of all code changes, so even your case 1 needs a ticket reference. Was it a bug? A feature change? Is it linked to requirements? Has it been tested and verified? Which release will it be in?