is the person responsible for the business value of the project and for deciding what work to do and in what order when using a Scrum method

product owner

Explanation:

The Scrum method is a framework for developing, delivering, and sustaining complex products in many fields of including research, sales, marketing and advanced technologies as seen below. In this methodology, the individual responsible for the business value of the project and for deciding what work to do is the product owner. This individual is usually the project's key stakeholder which gives him the responsibility of providing the vision of what the product should ultimately be to the rest of the team..

rational decision making is a multi-step process for making choices between alternatives. the process of rational decision making favors logic, objectivity, and analysis over subjectivity and insight. the word “rational” in this context does not mean sane or clear-headed as it does in the colloquial sense.

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