1. The document discusses frameworks for evaluating IT investments and measuring their efficiency and impact on business performance. It provides models for assessing costs, benefits, and value added by IT. 2. Key factors that influence the success of IT projects are identified such as strategic alignment, clear objectives, management processes, and maturity of business judgement. Common causes of project failure include neglecting strategic considerations and overfocus on costs. 3. Metrics are suggested for measuring improvements from implementing integrated systems like ERP. Case studies demonstrate how organizations achieved efficiency gains, cost savings, and better decision making through IT.