The video wall processor should be expandable, able to support a video wall that has the potential of growing without having to add a second processor. While the number of monitors on your video wall may not change significantly once it’s deployed, you should still plan for expandability on the number of outputs of your video wall controller, this is especially true for control rooms. As a rule of thumb, plan to have enough outputs to handle one additional row or column of monitors on your video wall. Expandability is also important for the number of sources you want to make available for your video wall, whether they are physically connected sources or IP sources. Here, we would recommend to plan for at least plan a 20% expandability in the capture capacity of your video wall controller.