Company C was selected because, first, it was the one of several companies that have received funding from the Department of Health to establish lactation rooms in its factories; hence, it provides lactation rooms and breast pumping breaks for working mothers. Second, this company has many female employees. Third, the researcher was able to visit the company's plants and record information about the facilities and the space allocated to the lactation rooms, which can be classified into two types: breastfeeding rooms with independent space versus no dedicated space, only curtain separators; thus, the influence of different lactation room conditions in the breastfeeding-friendly environment on continuing breastfeeding behavior could be evaluated. Moreover, the female employees were office workers or worked in a clean room (a room that is maintained virtually free of contaminants, used in laboratory work and in the production of precision parts for electronic equipment). Office workers have higher educational and compensation levels than clean-room workers and generally work about 8 hours/day, but their positions encompass specific job responsibilities. By comparison, clean-room workers work 12-hour shifts. Their jobs are inconvenient and inflexible because they must remove and put on their clean-room suits when leaving and returning to their workstation. Therefore, we were able to observe the association between different working conditions and intention to continue breastfeeding.