Final answer:
Scrum is based on an adaptive process control, which focuses on iterative work cycles, continuous improvement, and flexibility in response to change.
Step-by-step explanation:
Scrum is based upon an adaptive process control. Unlike predictive models that try to establish and follow a plan with few changes, adaptive approaches such as Scrum rely on iterative work cycles (sprints) and continuous improvement. This allows teams to reflect on the previous work, adapt their plans accordingly for the next iteration, and embrace change to deliver the product that best meets the customer's needs. Scrum is widely used in agile software development and its key characteristics include collaboration, flexibility, and a focus on delivering value quickly and effectively.