## 3 Results and Discussion
### General Proposed System Feedback  
The interviewees' comments on the usage of smartphone during evacuation were very positive. All interviewees agreed that developing an evacuation emergency system that sends messages to occupants during evacuation would be very useful. However, five interviewees raised concerns that occupants during evacuation tend not to concentrate on what actions they are taking due to stress and panic. The proposed egress system should not be web-based because of the risk of network problems, but might be driven by a nearby control room on a local area network. Different occupants had different understanding and knowledge of fire evacuation, therefore training/induction would help the evacuation process. Another four interviewees stated that smartphone technology is advancing very rapidly, and since they carry smartphones everywhere, then it needs to play a key role during the evacuation. One of the interviewees stated \"smartphone is an item that one cannot stay without for many people. So if you know everyone is carrying the device, you can also use it to also assist with the fire evacuation for high rise residential building would be great\". Moreover, one interviewee explained that this evacuation system should only be used for buildings above 20 floors, as they believed any buildings less than 20 floors could be easily evacuated without such a system. The same interviewee explained that in order for this system to work, smartphones need to attract their owner's attention even when the owner was far from the smartphone, for example, by using bright lights or a loud alarm sound. This would ensure that occupants have received their unique text message and are in the process of gathering information and following instructions. One interviewee stated that just as smoke detectors and heat detectors set off the fire alarm, similarly signals from such sensors can trigger the delivery of alerts to the smartphone. In addition, one interviewee added that they have a similar system installed in their car and smartphone. The car is parked between 11 pm and 8 am in the building garage. Hence, if the car moves between these times, then the phone beeps. Therefore, the interviewee explained that a similar system could be created for fire emergencies. However, they added that the smartphone would need to keep beeping in case of fire to make sure the message is received by the occupants even if they are sleeping. It was added that the building evacuation plan should be on every occupant's smartphone, even if the system is not working. Interviewe results show that developing an evacuation egress system is promising and will have many advantages during fire evacuation. However, it was stated by six interviewees that training is required for all building occupants and the system needs to be tested in a number of fire drills before it gets implemented fully in high-rise residential buildings. One interviewee added that when they enter their bank, they get a welcome message on their phone, their queue number, and the approximate waiting time. A similar concept could be adopted for smartphones and high-rise residential buildings. Although buildings have a number of evacuation routes and an evacuation plan, it can still be difficult to decide which is the suitable route to take. Therefore, developing a system that could aid during evacuation will be beneficial for occupants. The responses showed that interviewees believed that when new tenants move into the building, they will need to be given an induction of the fire safety plan in the building and how to use the evacuation system developed to evacuate in case of a fire emergency. One interviewee stated that \"the system could not just be used for high-rise residential buildings but it could be used for other building such as hotels\", where occupants are not familiar with the evacuation plan and egress routes. Another interviewee agreed and stated that evacuating from high-rise residential buildings will continue to be a challenge.