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User stories are written by or for users or customers to influence the functionality of the system being developed. In some teams, the product manager (or product owner in Scrum), is primarily responsible for formulating user stories and organizing them into a product backlog.
The INVEST mnemonic for Agile software development projects was created by Bill Wake [1] as a reminder of the characteristics of a good quality Product Backlog Item (commonly written in user story format, but not required to be) or PBI for short. Such PBIs may be used in a Scrum backlog, Kanban board or XP project.
Scrum Agile events, based on The 2020 Scrum Guide [1] Scrum is an agile team collaboration framework commonly used in software development and other industries. Scrum prescribes for teams to break work into goals to be completed within time-boxed iterations, called sprints. Each sprint is no longer than one month and commonly lasts two weeks.
Planning poker, also called Scrum poker, is a consensus-based, gamified technique for estimating, mostly used for timeboxing in Agile principles. In planning poker, members of the group make estimates by playing numbered cards face-down to the table, instead of speaking them aloud.
It is mostly used in Scrum terminology where the work is planned in terms of features (or stories). For example, as a very basic approach, a software project may consist of three layers (or components): Data access layer (bottom) Business logic layer (middle) User interface layer (top) In this common approach, a vertical slice means a bit of ...
The User Stories are then added to the board and the team completes them, working on as few User Stories at a time as practical (work-in-progress, or WIP). To keep iterations short, WIP limits are used, and a planning trigger is set to know when to plan next - when WIP falls below a predetermined level.
In Agile software development, requirements are often expressed as user stories with accompanying acceptance criteria. User stories are typically part of a feature, or an epic, which is a broader functionality or set of related functionalities that deliver a specific value to the user based on the business requirements.
Thus, they can be used as reference user stories. [3] Supplier and customer then come together in a workshop to define the expenses for the entire project based on these reference user stories and all other epics with the help of story points. Assumptions are also made in terms of implementation risk and business value.