# Efficient
> Commands are scannable, giving users just the right amount of information at the right time.
import Separator from '@site/src/components/Separator';
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## Informing
- Keep users informed when processes are known to take time
- Give users time indicators when possible
- Use loading bars showing progress when possible
- Make things time out and notify users promptly
- Assume users need support
## Robustness
- Ensure your program validates user input
- Ensure your program can recover and bring the system back to safety
- Ensure your program terminates when it’s invalid or fails
- Ensure system resilience by implementing retries and failovers
- Ensure your program cannot be misused or abused
