What are some of the factors that affect vigilance. Which one do you think is t

What are some of the factors that affect vigilance. Which one do you think is the most detrimental and why? What would you do to remedy this problem?
Answer should be 200 words at least and have a link with Source
then reply to the following discussion questions with link of the source for each question:
1- Does the appropriate ratio of time working and time on a break change for every individual?It is well known that people should take breaks in between their work and school days; the question is when should they be taken? For someone who has a high – stress job, such as someone in the medical field, breaks can be difficult to take and are overlooked in favor of having more people helping out the community. Does this truly help the patients in this scenario, or would they be better off having doctors and nurses who are properly rested and have a clear head to think through their problems? This would be the same in aviation and many other fields. Does having more people constantly on shift for long periods of time truly have a better outcome than having less people but having them better focused?
2-how benificial would a haptic feedback system be to surgeons and other intense jobs?Haptic feedback systems provide physical reactions to electronic signals, allowing a person to feel the textures of digital items. Recent advancements in medical science allow surgeons to perform high – precision surgeries using machines. These machines have saved many lives that would have otherwise been lost. Most would agree that anything that can be done to improve these technologies would be greatly beneficial. The issue with the current systems is discomfort for the surgeon. The machines require specialized training and most medical schools teach in the more traditional style of surgery. Giving the surgeon the precision of the current machines, while allowing them to feel the process as if it were a more traditional surgery, would make the process easier, thus saving more lives.