“…Sambamurthy and Kirsch (2000) identified seven core concepts in ISD literature -tasks (of the development team including planning, analysis, design), stakeholders, agenda (stakeholders' goals), transactions (stakeholder actions), context (outside of the stakeholders and team), structure (e.g., SDMs, tools, policies) and outcomes. Similarly, Curtis (1988) proposed a "layered development model", which gives the possible units of analysis for studying ISD, including "individual", "team", "project", "company" and "business milieu". Meanwhile, Bansler (1989) organized ( …”