Successful software delivery requires meeting customer satisfaction and feedback, quality standards, and being on budget, timeline and scope. Key points include detailed planning with requirements, milestones, and risk assessment, as well as allocating sufficient human, time, and monetary resources. Regular communication through clarity, feedback, and handling changes is also important. Common barriers include incomplete requirements, lack of user involvement, unrealistic expectations, changing specifications, insufficient planning or resources, and lack of management support. A human-centric approach considers psychological needs for certainty, significance, connection, and growth.