# Architecture principles whose scope is operation

> 3 records

This index as JSON: https://banes-lab.com/json/api/facets/architecture/scope/operation

## Entries

- [Fail Safe](https://banes-lab.com/records/architecture/fail-safe.md): A design rule that a failing operation leaves the system in the state that causes the least harm.
- [Visitor Pattern](https://banes-lab.com/records/architecture/visitor-pattern.md): A design pattern that places each operation over a type hierarchy in its own visitor, so an operation is added without editing the element types.
- [Atomicity](https://banes-lab.com/records/architecture/atomicity.md): A design rule that the steps of a state change either all take effect or none do.