A project life cycle consists of phases including starting the project, organizing and preparing, carrying out project work, and closing the project. It is contained within one or more product life cycles, as a single product can have multiple associated projects. Project phases can be sequential, overlapping, or iterative. Factors like cost, staffing, risk, and cost of changes influence projects differently in the initiation, middle, and closure phases. Stakeholders include customers, users, the project management office, business partners, and the project team. Organizational process assets that can help manage a project life cycle include templates, guidelines, communication plans, a knowledge base, databases, and lessons learned.