According to the PMBOK® Guide, Project Management is defined as the application of knowledge, skills, tools, and techniques to project activities to meet the project requirements.

Core Purpose: Project management is accomplished through the appropriate application and integration of the project management processes identified for the project. It allows organizations to execute projects effectively and efficiently.

Effective Project Management: Managing a project typically includes, but is not limited to:

Identifying requirements.

Addressing the various needs, concerns, and expectations of the stakeholders in planning and executing the project.

Setting up, maintaining, and carrying out communications among stakeholders that are active, effective, and collaborative in nature.

Managing stakeholders towards meeting project requirements and creating project deliverables.

Balancing the competing project constraints, which include, but are not limited to: Scope, Quality, Schedule, Budget, Resources, and Risk.

Analysis of Other Options:

A. A logical grouping of project management inputs...: This describes a Project Management Process. Processes are the " building blocks " that make up the practice of project management, but a single grouping does not define the entire discipline.

C. Launching a process that can result in the authorization...: This describes the Initiating Process Group or specifically the Develop Project Charter process. While a critical part of project management, it is only the starting phase.

D. A formal, approved document...: This is the definition of the Project Management Plan. This document is a primary output of the planning process and a tool for management, but it is not the definition of the practice itself.