In the context of project management, particularly in methodologies like Scrum, a product increment is the sum of all the product backlog items completed during a sprint and all previous sprints. At the end of a sprint, the new increment must be "Done," which means it must be in useable condition and meet the Scrum Team's definition of "Done". An important aspect of this process is ensuring that every user story has acceptance criteria. These criteria are conditions that a software product must satisfy to be accepted by a user, customer, or other stakeholder. By ensuring every user story has acceptance criteria, the project manager can ensure that the product increments deliver the anticipated requirements12. References: Scrum Alliance, PMI BIS Consultancy Dictionary