Plan your shots ahead of time so you know the type of blue screen you need for the shoot. The size of each shot is crucial to the size of blue screen you need. For instance, if you are only shooting mostly tight shots of one to three people, a 12-foot by 12-foot blue screen frame will do. However, if you have scenes requiring wide shots of a number of people and large sets and props, you need a much larger blue screen background. The same requirement goes when you are shooting only one person, but the on-camera talent or the camera itself moves around a lot during the take. For a small chroma shoot set-up like a 12-foot by 12-foot blue screen background, a blue screen frame typically made of blue fabric and metal frame will do. You can easily fold this portable blue screen set-up. For more demanding scenes, you may need at least an entire wall of a large studio to accommodate the type of shots you need.
Load your blue screen on your desired location. If using a studio wall as a blue screen background, make sure that the wall is free from dirt and unnecessary marks. If using a portable set-up with a blue screen frame, make sure that your blue chroma cloth doesn't create folds during the shoot. The basic rule of shooting on blue screen is to make sure that the background is evenly lit from top to bottom and from left to right. Make sure you keep the frame stable by using sand bags to put more weight on it, especially if the shooting set-up is prone to accidental bumps and wind effects.
Wait until the art department finishes mounting the sets and props in front of the blue screen background. After this, the lighting department starts setting up the lights, then the camera and acting departments follow. During these preparations, you may need to adjust the blue screen background for possible technical or creative issues. Address any concern to the appropriate department. Once everything is set, the production can start shooting the first scene.