Agile Estimation:8 Steps to Successful Story Point Estimation.
Estimate your stories and have some fun with your agile team!
Much of Scrum's value to an organization is in creating transparency. 100% agreement isn't the real point of planning poker; the goal is actually to narrow the cone of uncertainty around feature estimates as much as possible, and to make the level of effort and potential project risks of each story visible to stakeholders through their chosen proxy, the Product Owner.
Planning Poker uses of the Fibonacci sequence to assign a point value to a feature or user story. The Fibonacci sequence is a mathematical series of numbers that was introduced in the 13th century and used to explain certain formative aspects of nature, such as the branching of trees.
Estimating the effort involved in developing product backlog requirements is an ongoing process. The Fibonacci sequence is an excellent sizing technique for relative estimating. With Fibonacci, if something is bigger, you get an idea of how much bigger it is. The last two numbers in the sequence are added together to create the next number.
The Scrumpy Planning Poker application is a useful free tool that allows estimating tasks in a collaborative way both by colocated and distributed team members following the Planning Poker rules. The refinement session is lead by the Product Owner (PO) or the Scrum Master (SM). You can start your first Scrumpy Planning Poker session right away!
Story Points. Story Points represent one of the most important sides of Scrum. They are deeply integrated in Scrum along with Planning Poker technology. The most common problem Scrum Teams stumble upon is the inability to evaluate the difficulty of a task and time cost correctly. The graph from the article about the Burndown Chart clearly shows.
As you have to know if you are using Scrum for a while in each Sprint Planing you have to estimate what is the size of each user story. You can use T-Shirt or story points to give an estimation per user story. One of the common activities is to do a planning poker where each team member choose a number to decide the size of user stories. To do that you can use cards with the different sizes.