4. the existing literature portrays the field of OPM as scattered and dispersed subject areas, insufficiently integrated over organizational levels or networks. This knowledge gap is addressed through a conceptually derived model of OPM and its constituting elements. - Muller, Drouin & Sankaran (2019) in Modelling Organisational Project Management, Project Management Journal, 50(4):499-513. Required: The authors propose a seven layered, 22 element onion model of OPM. Discuss the Business Integration (6 marks), Organisational Integration (6 marks) and Project Governance (8 marks) layers of the suggested model.