| One older adult in a two-story home | Uses a cane or walker; may have difficulty with stairs or carrying items. | Maintain independent access to regularly used floors and rooms. | About 6–10 one-way trips per day; often concentrated around bedrooms, kitchen, and living areas. | Easy-to-use controls, a safe entry and exit, suitable space for the mobility aid, and a plan for power or equipment outages. |
| Wheelchair user living with a partner | One user relies on a manual or powered wheelchair; a companion may travel at the same time. | Move between floors without transferring out of the wheelchair, where the selected design allows. | About 8–14 one-way trips per day, with recurring journeys between sleeping, living, and entry areas. | Check the wheelchair’s turning and occupied dimensions, clear door opening, platform or car size, load capacity, and accessible approach space. |
| Family with young children in a two-story home | Adults may carry a child, stroller, laundry, or groceries; no household member may currently have a mobility limitation. | Reduce repeated stair carrying and improve convenience between floors. | About 10–18 one-way trips per day, with peaks during morning routines and bedtime. | Consider child-safe operation, usable capacity, door protection, placement near daily routes, and whether the expected convenience justifies installation and upkeep. |
| Multigenerational household across two or three floors | Residents have different ages, heights, strength, and comfort using controls; needs may change over time. | Provide convenient floor access for multiple users and accommodate future mobility changes. | About 15–25 one-way trips per day, often shared among several residents. | Review expected simultaneous passengers, mobility equipment, control reach, landing space, likely use frequency, and maintenance arrangements. |
| Temporary recovery after surgery or injury | A resident may temporarily use crutches, a walker, or a wheelchair and may need assistance. | Reach essential rooms while following medical advice about stair use and transfers. | About 4–8 one-way trips per day; trip frequency can change as recovery progresses. | Compare installation time and site requirements with the expected recovery period; confirm suitability with the treating clinician and a qualified installer. |