According to the overall staffing organizations model, what is an example of a core staffing activity?

As the word “core” suggests, those activities that fall under that heading or category are most central to the mission of the organization. In contrast to “core” activities are support or peripheral activities, such as maintenance and security, which may be essential to the well-being of the organization, but which do not define it and are not the raison d’etre for which the organization exists. Within most staffing organization models, therefore, “core activities” include the identification and recruitment of potential employees or members qualified to execute the organization’s mission. In addition to basic staffing considerations like matching applicants to positions, organizations are concerned with retaining key personnel—those uniquely qualified and experienced the loss of whom would represent a financially costly set-back.
A “core staffing activity,” to conclude, is recruitment of qualified applicants. Absent the identification and hiring of personnel, the organization will obviously fail.