Answer:
User Experience Design {UX}
Step-by-step explanation:
User Experience Design deals with the complete process of acquiring, understanding and integrating a goods or product, that includes the aspect of its design, purpose and usability. It deals with a user group, their abilities and challanges. it promotes quality of users experience and their perception towards the provided services.
Simply put, it is having a deep knowledge of users attitude and feelings towards a particular product.
In this case, the study measured the use of stair near elevators. It intends to encourage the use of stairs instead of elevator. The second measurement for another month will hope to show an increase the use of stairs as signs were placed to encourage thus.