A set of rules to be processed by a computer program that involves repetition of steps is a/an:

An algorithm is a well-defined set of rules or steps that provides a procedure for solving a problem or performing a task, especially in the context of programming. It is characterized by its ability to repeat steps, which is essential for performing tasks that require iteration, such as sorting a list, searching for a value, or processing data in multiple passes. This repetition allows algorithms to handle large datasets effectively and efficiently, establishing a clear framework for decision-making and execution within a computer program.

In contrast to an algorithm, architecture typically refers to the overall design or structure of a system or software application, encompassing its components and their relationships but not necessarily detailing the repeated processes within those components. Normalization process relates to organizing data within a database to reduce redundancy and improve integrity, which does not inherently involve the step-by-step repetition characteristic of algorithms. A use case describes how a user interacts with a system to achieve a goal, but it does not define the procedural steps necessary to accomplish tasks as an algorithm does. This makes the understanding of algorithms central to programming and computational thinking.