Proactive behaviour is currently a key problem in the study of organizational behaviour. Using proactive motivation theory as a foundation, this article suggests the impact of a high commitment work system (HCWS) on an employees' proactive behaviour and develops the mediation model, which includes this positivist paradigm, having of three AMO factors (ability, motivation and opportunity). The staple aim of the article is to identify the blended association of Organizational factor (HCWS) as well as the Individual level factors (AMO) on an employee’s upbeat performance. The objective of this research is to determine if and how supervisors' direction effects the human resource management (HRM) process. This research is underway in the manufacturing sector to investigate the proactivity inspired by the performance management work system. For that intent, information has been gathered from HR executives and staff of 43 corporations located in Lahore and operating nation-wide, and used the document procedure and Google Forms in accordance with the agreed-upon approach with each firm's HR office. 450 questionnaires were distributed. The number of responses was 88%, but then after scrutiny, 76% of the surveys were correctly filled, in which the responses were analyzed and used the newest version of SPSS software and direct-indirect routes of conceptual framework are examined with Process by Hayes extension (Model 4). The results show that there is positive significant impact of HCWS on Proactive Behavior of employees, greater the intensity of AMO Framework, stronger the impact. AMO Framework mediates the connection among HCWS and Proactive Conduct significantly. This study opens a new aspect of having highly committed work system so employees can behave more proactive if they are empowered as per their potential and abilities, motivated with incentives, balanced work-life conflicts and if they are open enough to recognize the available opportunities. This study will broaden the HRM mechanism of firms to study the need of their employees and thus strategic goal of the firm can be achieved.