This paper aims to explore the effects of organizational size on organization effectivity. Organization or workforce size in this paper is defined as the number of employees in a geographical location, as defined by Michael Beer, or the number of persons employed in the organization. Also defined in this paper is organizational effectivity or effectiveness, which refers more to goal attainment. Topics also discussed in this paper are the effect of organization size on employee participation, which is also discussed at length here and can be direct and indirect. The two forms of direct participation are also included in this paper, as well as the determinants of employee participation. Three of them have been used in this paper: competition, indirect participation, and organization size. Other topics included in this paper is the effect of organization size on employee performance, training and development, which is described as crucial for an organization’s growth and survival. The effect of organizational size on employee performance is also discussed in this paper, where some researchers found that there is a positive and a negative relationship. Mentioned briefly are the methods in which employees from the private and public sector are evaluated where their performance is concerned. Three more topics have also been integrated in this paper: the effect of organization size on employee interaction and engagement, and organization culture, along with the advantages and disadvantages of large organizations and small organizations. The discussion on the effect of organization size on employee engagement and interaction are separated into two separate topics, as engagement and interaction are not synonymous with each other where this paper is concerned. Employee engagement, in this paper, would mean the commitment of the employees to work and attain organization goals. Included in the discussion about the effect on employee engagement are the key factors of employee engagement.
Keywords: organization effectiveness, workforce size, employee performance, employee engagement, employee participation, organization culture