Guideline (noun)

1. A general rule or principle that provides direction or advice.
2. A statement or document that provides recommendations or instructions.
3. A principle or rule that provides direction or advice.
4. A statement or document that provides recommendations or instructions for a particular activity or situation.
5. A document that provides general advice or instructions for a particular situation or activity.

Origin:

Late 19th century: from guide + line.

Examples:

1. The company has a set of guidelines for its employees.
2. The guidelines for the project are clear.
3. She followed the guidelines when writing her report.
4. The guidelines are intended to help ensure safety.
5. The guidelines provide direction for the team.