These are principles of the scientific method, as opposed to a definitive series of steps applicable to all scientific enterprises.    Though there are diverse models for the scientific method available, in general there is a continuous process that includes observations about the natural world.
An offline version of the introduction guide to scientific method by Explorable.com
scientific method is an approach to data collection that relies on two assumptions: (1) Knowledge about the world is acquired through observation, and (2) the truth of the knowledge is confirmed by verification--that is, by others making the same observations”
The scientific method is a series of techniques that are used to examine phenomena. Actually, all discoveries and inventions are sourced by different types of questions.