Exposure factor selection for optimum image quality is one of the most challenging aspects of radiography. In your attempt to produce an image of a patient's hip in the AP projection, you become frustrated with the image you have created, as it is suboptimal in image quality. When you show the image to the supervisor, he abruptly states that you need to repeat the image and this time "get it right." As you begin to repeat the image, your first critical analysis thought should be to: