Information system projects are gaining immense popularity among the manufacturing organisations across the globe. Due to the challenges associated with the information system project management with the manufacturing organisation, organisations have started focusing on technology-oriented solutions such as Information system (IS) projects. However, the success or failure of these projects is ultimately dependent on a range of critical success factors. The purpose of the research was to investigate the Critical Success Factors (CSF) in an Information System (IS) project using the case of Wartsila, a manufacturing organisation operating in marine and energy sector. For this purpose, a qualitative research method was adopted with semi-structured interviews carried out with the IT manager, the Integration Manager (Int. M), and the project teams involved in the project. Thematic analysis, which was chosen as the appropriate data analysis method, assisted in the identification of several codes that were categorized and finally guided to the extraction of seven (7) key themes. A conceptual framework was drawn from the secondary literature review containing CSF within the two major categories such as subjective and objective CSFs. The set of subjective CSFs included project management and team member, commitment and management support, training, change management perceptions, communication, and project planning and management. On the other side, the set of objective CSFs included the process of redesigning, technological difficulties in system design, costs, time engineering, and quality.   These literature-based factors were simultaneously analysed by the responses of the interviewees, ultimately ending up in the development of a modified and comprehensive framework for the manufacturing organisation. The findings revealed the significance of subjective factor in shaping the accomplishment of objective factors, drive the project towards the success. These findings have further recommended the need for culturally sensitive ‘training’ and integration of formal and informal ‘communication’ methods for the success of the projects in the manufacturing organisations.