Which of the following is NOT important to check during door operation?

When evaluating door operation in a hoistway, it's essential to focus on the functionality and performance of the doors. The checks for scratches, noises, and movement smoothness are indicative of the door's condition and operation efficacy.

Scratches can affect the aesthetic and potentially indicate wear or damage that could impact operation. Noises during operation can suggest mechanical issues that need immediate attention to avoid malfunctions or safety hazards. Movement smoothness is crucial, as any obstruction or mechanical failure can prevent the doors from operating correctly, posing risks to safety and efficiency.

Color discrepancies, while they might be notable from an aesthetic perspective, do not typically affect the operational performance of the doors. Thus, while maintaining visual appeal is important, ensuring that the doors function smoothly and safely takes precedence. This makes color discrepancies less critical compared to the other factors listed.