The estimated time saved per trip is 100 seconds for 10
persons.
On average, it means each person saves about 10 seconds.

Lift reached floor, Employee enters the lift and press the
button. This action takes less than 3 seconds. Assuming it is a
lift serving 20 floor, 12 people are at Ground level entering the
lift, and each of the 12 people are heading to different floor.
Calculating from employee entered the lift and pressing lift
button, to door closed, and based on the linear calculation, we
derived that it would take less than 20 second for 12 people to
enter the lift and for the lift door to close.
At no way it will save 10 sec per person.
Current lift design allows multiple pressing of lift button i.e.
allows both e.g story 4 and 5 to be pressed together. In areas
where lifts are serving higher capicity, there will be another
panel serving the adjacent side of the lift (for handicaps). These
two will work hand in hand.
I proposed an intelligent intergrated system with the following
characterisitic
1) lift door close when nobody at the door for 3 sec
2) Multiple panels of lift button with multiple sensing i.e.
press multiple butttons at the same time
3) Intelligent software where it can lock the lift at the level
once it reaches the floor.
Current design allows the pneumatic lock to be activated only
when the lift reach the floor. The new design will be more faster
in locking i.e signal will initiate the locking of the life within
0.5 sec once it reach the floor .
I really like your idea, but your is ideal for buildings above
20 stories. To better optimised the system, the system should be
better improve at the speed of the door closing and the time delay
when tehe pnuematic lock is activated and the door opened. For
buildings with higher floors, the speed of the lift will be the
main concern.