The DEEP Method Used For Product Backlog Grooming – How To Prioritize the Product Backlog Items In Scrum

It is very important to prioritize the product backlog from time to time so that it remains updated, and “healthy”. The DEEP method used to refine the product backlog items can be understood as follows:

1.    Detailed appropriately

User stories to be taken up for development soon should be properly understood and taken up for development in the upcoming sprint. The user stories which are not to be developed on an immediate basis can be mentioned briefly and described with lesser details.

Generally, the user stories or the product backlog items having a higher priority should be developed first, followed by less important ones. The smaller and more detailed user stories, which a have higher business value should be place on the top, followed by those which have lesser business values and priorities. Epics and large user stories should be broken down in to smaller, more manageable ones, and taken up for development in succeeding sprints. If the entire product backlog is to be detailed in each grooming session, it would take too much time, and even after investing it, the priority can change in the subsequent refining sessions. Therefore, it is not advisable to carry out the grooming session in totality, each time the session is conducted. The objective should be to target the most important user stories based upon the feedback availed from the stakeholders and detail them as per the new priority. The PBIs should be shifted up or down in the order, and larger epics can be broken down into smaller stories and reinserted in appropriate places within the backlog as per the need.

2.    Estimated

Besides containing the product backlog items or user stories, the product backlog is an important and useful scrum planning tool. It should include estimation in terms of story points for each backlog item.

Estimation is possible in scrum when story points representing the degree of importance are associated with each product backlog item. It is very important for the user stories to have a certain business value associated with them when they are included in the product backlog. The product owner works out how the story points should be allotted to each item in the backlog. The story points, or the estimate is very useful in planning future sprints, and while creating the burn down charts while a sprint is currently being executed. It is essential for each user story to have a priority, at least when they are important, and to be taken up for development on an immediate basis.

3.    Emergent

The product backlog is dynamic in nature and changes with time as the project develops. AS more information is availed, new user stories can be added, existing ones updated and reprioritized, and redundant ones removed.

In practice, a product backlog is never static, and will change over time. As more is learned, user stories in the product backlog can be added, updated, or removed depending upon the feedback received from the stakeholders and investors. Moreover, the development team should carry out routine perusal and remain conversant with the product backlog so they find it easy to understand the user stories when they are taken up for development. The members should demand explanations about items not clear to them, and the product owner is supposed to resolve the queries as soon as possible in a satisfactory manner. The product backlog should complement the vision seen by the stakeholders and the product owner, and fulfill the expectations of developing a shippable product which is profitable.

4.    Prioritized

The product backlog should be properly arranged as per the priority of the user stories, preferably at all times.

Although scrum advocates that each item be properly estimated before it can be added to the product backlog, in practice, this seldom happens. When the product backlog is initially planned, the product owner understands that some of the stories need to be developed because they are essential and needed to complement the product, or make it shippable. However, quite often, he or she fails to receive proper feedback from the stakeholders regarding their importance, or receives it at a later time. In such circumstances, the common practice is to include the user story in the backlog, and wait for further information to pour in so a priority can be assigned for the particular story. Scrum advice this should not ideally be done, and information should be availed to prioritize the item before it can be taken up for development. 

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Source:- http://computersight.com/programming/the-deep-method-used-for-product-backlog-grooming-how-to-prioritize-the-product-backlog-items-in-scrum/