Help Pre-flight analyzer
Pre-flight analyzer
- Checking a file without an account The FET helper reads a .fet file and proves what FET cannot build. It is free, it needs no account, and your file stays on your computer.
- What the pre-flight check does A check that reads your rules and proves whether a timetable can be built at all — before you spend an evening finding out.
- The four kinds of finding The check sorts every finding into four kinds. Only the first kind proves that FET cannot build the timetable.
- Fixing what it finds Every finding names the rules behind it, and you can ask what would happen if one were switched off — without switching anything off.
- What it cannot tell you The honest limits — what a clean report does not promise, which checks depend on your solver mode, and why the difficulty number is not a verdict.
- Asking questions about your timetable The optional assistant on the FET helper. It answers in words, you choose where it runs, and your .fet file never leaves your computer.
- When a model will not run in your browser The model list is empty, or a model refuses to start. Four things to check, in the order that finds the cause fastest.