The first phase is to collect customer high-level requirements and prepare product backlog. Customer requirements are ordered based on their priority in a product backlog. These requirements are prioritized by the product owner. The product backlog includes all of the features that the customer expects in the final product. These requirements are termed user stories.

A user story provides details about the requirement from an end user perspective, focusing on what they want to do or what feature they want to have in a product. These user stories do not include the complete set of requirements—instead, they only include features that customers have in their mind at the time of starting a project. The customer expected feature list can be changed during implementation, but the product backlog still acts as a requirement document for the Scrum process for implementation. This document is used as a base document for sprint planning.