When evaluating a Tech-Long packaging machine, ask the manufacturer how many mechanical elements need to be adjusted and which systems the manufacturer has created for ease of adjustment, accuracy and repeatability. Ideally, product changes are easy for both the operator and the maintenance technician. When purchasing a packaging machine, take the time to learn the Human Machine Interface (HMI). Consider if regular operators can navigate the HMI easily with moderate training. Determine how many clicks it takes to get to the desired screen, less is better. Successful HMIs will resemble smartphones: the HMI will contain clear and memorable icons and a minimum of words.