Finance built a commission calculator with a rounding bug

“The quarter ends Friday.”— Group Controller

Reason:

Because Katrin from Finance is on holiday until June. Started as Invoices_Q3_v2.xlsx with a script attached.

Built by:

Tobias, a team lead

Build time:

2 evenings

Built with:

Streamlit

Database:

a SOAP service returning XML from 5 years ago

Authentication:

the guest account can see more than expected

Deployment:

behind a domain that still contains the word test

Responsible:

a team that has since been reorganised

Documentation:

a calendar invite description from May

Security situation:

the JWT secret is "changeme"

Future disaster:

It will outlive two reorganisations.

Age: 170 days · originally expected to last 2 months · 1 owner so far · survived 1 reorganisation · last meaningful change 19 days ago · original builder left 167 days ago

Rated common mostly because: 301 users, the builder has left, 1 departments depend on it.