The step-by-step process you use to get a task done is workflow. You may not want to interrupt your workflow in the middle of the day, but it's important to eat lunch!
While bosses and workers have always had some concept of the idea of workflow — the series or pattern of steps from the beginning of a work project to the end — this term didn't emerge until the mid-20th century. Originally, workflow was used to describe the process of manufacturing and factory work, while today it's often used in the context of office work. Do you have a routine process for completing homework assignments? Then that's your workflow.