Below is a simplified table from a garage door installation company that was having trouble making a profit because of service and warranty calls. Because the company installs doors for builders, they sometimes have multiple service calls to install each door piece$-$by$-$piece. They may have to install, replace, adjust, or lubricate some part to get the door working properly. They work with five key parts: door, motor, track, vinyl trim, and T$-$lock. Which of the following tools would you use to analyze this problem?