Safety4Sea

Each fire included the following four stages of development :

1. Ignition: when a fire starts for any reason

2. Growth: when oxygen and fuel to burn is found, fire is growing

3. Fully Developed: when reaching the Flashover point, all combustible material in the fire area will ignite due to high temperature

4. Decay: when all combustible material has been burned and fire has no other source to feed it

https://safety4sea.com/cm-fire-detection-on-board-ships-key-things-to-consider/