Project Management
Project management is the application of knowledge, processes, tools, and techniques to plan, execute, monitor, and close a time-bounded effort that produces a defined deliverable within constraints of scope, schedule, and budget[^c1]. It draws together a body of knowledge, skills, tools, resources, and techniques[^c2] that is applied to temporary, unique undertakings rather than to routine operations: the Project Management Institute defines a project as a temporary endeavor undertaken to create a unique product, service, or result[^c3]. The discipline has developed across construction, engineering, defence, information technology, healthcare, and many other sectors, and its practices are codified in standards used worldwide.
The work is organised around two complementary frameworks. The project lifecycle runs through five phases — initiation, planning, execution, monitoring and controlling, and closure[^c5] — while the Project Management Institute's body of knowledge defines process groups covering initiation, planning, executing, monitoring and controlling, and closing, along with ten knowledge areas that practitioners must address[^c6]. The process groups describe what a project manager needs to do at each stage, whereas the knowledge areas describe what a project manager needs to know[^c7]; together they cover scope, schedule, cost, [[knowledge-areas/quality-management|quality]], resource, communications, risk, procurement, integration, and stakeholder management. Running through all of them is the trade-off among scope, schedule, and budget — the relationship practitioners call the project management triangle, in which pushing on one constraint moves the others[^c4].
Approaches to delivery range from the predictive to the adaptive. Waterfall methodology is a linear, sequential project management approach with distinct phases and rigid progression[^c8], well suited to stable requirements and fixed outcomes. Agile is a mindset and philosophy around building products that espouses collaboration, customer-centricity, and expecting and responding to change[^c9], and it is implemented through frameworks such as Scrum and Kanban. Other established models include PRINCE2, a project management methodology mostly used in the UK, Australia and European countries[^c10], and process-improvement traditions such as Lean and Six Sigma. Practice is increasingly tailored, combining elements of these approaches to suit a project's context.
Surrounding the delivery work are the people and structures that make projects accountable: the project manager, the project team, the sponsor, and the project management office, operating within functional, matrix, or projectised organisational structures. Governance, change control, risk management, and benefits realization connect what a project delivers to what the sponsoring organisation intended, while a familiar toolkit — the work breakdown structure, critical path method, Gantt charts, earned value management, and risk registers — supports planning, scheduling, cost control, and risk tracking.