Designed for visibility, Preoperative Stop/Go Sign provides interactive checklist that optimizes preoperative process to enhance patient safety in OR. Functionality lets OR staff assess patient’s readiness from distance, identify preoperative delays, and perform early intervention. One layer of adhesive stickers form red STOP sign, and backing sheet shows green GO sign. As each preoperative step is completed, associated sticker is removed. Whoever removes each sticker can sign underneath.