Which characteristic does not apply to a well-designed door for stalls?

A well-designed door for stalls is intended to provide both functionality and safety. The characteristic that it should be operable only from the inside is not applicable because the design typically allows for operation from both the inside and outside to ensure safety and accessibility. For example, in scenarios where an emergency occurs, it is crucial for personnel or emergency responders to be able to open the door from the outside.

In contrast, a door being simple to use ensures that anyone can easily enter or exit without difficulty, which is essential for user comfort and efficiency. A door that blocks the passage when half-open is important for privacy and security, while being built solidly contributes to durability and effectiveness in maintaining the stall's environment. Overall, the emphasis on dual operability aligns with best practices in safety and convenience for stall designs.