If everything is going to plan, something somewhere is going massively wrong.—anonymous
This chapter has planning experiments related to large-scale Scrum.
For a small group, setting up a new Product Backlog is relatively simple work—maybe a day. For a larger product—for example, a ship-control system or medical device—involving 500 people with new hardware and software, one day is not going to do.
In this case, consider holding one and only one relatively long, highly structured, and intensive initial Product Backlog refinement ...