Open-plan offices facilitate staff interaction, it often takes time for people to get used to a new kind of work environment after possibly years of working in separate rooms. Noise control also poses a challenge in open-plan premises. Employees moving around in the office (as they are likely to do when working actively) will generate noise and cause other disturbances that must be considered in designing the spaces. Even normal everyday work sounds may prove challenging in open-plan offices. Since most of the sounds originate from the users or their activities, it is necessary to to also provide employees with proper guidelines when moving to new kinds of premises.