From a question to a usable answer.

Practical guides

Guides for small web teams: measure availability with clear windows and exclusions, and keep incident records worth learning from.

Define an availability measurement window

Percentages are meaningful only with a method.

Capture decisions and evidence without filling a giant form.

Convert each nine into downtime minutes.

Separate measurement, internal targets, and promises.

Record decisions while the incident is still fresh.

Use repair and failure intervals with clear limits.