When one organization first shifted to agile, the team had trouble with maintaining the product backlog. No one could agree on priorities for items, they didn't know which item should be groomed next, and the backlog wasn't transparent to everyone. This team found a better method that works for them.
Prakash Pujar writes about his team's experience adopting some of the best agile practices to make their process extra lean and increase efficiency by increasing throughput—all without any change to the agile framework his team was following before and after. Here, he talks about some of the lean practices that worked for them.
Chandra Munagavalasa writes that because the requirements change over time, the product backlog is never complete. As the project progresses and more detailed information becomes available, the product backlog items and their rankings change continually. One of the many techniques available for ranking the product backlog is the Kano model.