Question

In scrum how many times the product backlog be changed

Answer 1

The Scrum Team decides how and when refinement is done. Refinement usually consumes no more than 10% of the capacity of the Development Team. However, Product Backlog items can be updated at any time by the Product Owner or at the Product Owner's discretion.

Answer 2

In scrum the change is product back log is a continuous process. Since the system requires changes or refinement in regards to certain details.

Explanation:

• The Product Backlog keeps being changed on a regular basis since the owner of the product or the developing team may require to add some details,  certain estimates or items which the team reviews them and then works out  on adding them.  
• The owner of the product is mainly responsible for the content and its order and the backlog should consist of every detail that is needed for the product. It is the the only place to make any form of amendments for the product.
• The changes in the backlog can be made the development team but they need to seek the permission of the product owner. The product owner takes the responsibility of the product backlog

To know more about Product Backlog

Difference between product backlog and sprint backlog in agile

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