Final answer:
The project life span encompasses the entirety of a project's development, from initial conception through varying stages to its eventual completion or abandonment, including the strategic and organizational changes that occur throughout this process.
Step-by-step explanation:
The project life span is defined by multiple facets of a project's development and implementation. It is all of the above: a progression through a series of differing stages of project development; the total of the phases through which a project passes from inception until it is either put into use or abandoned due to success or failure; and it is also a concept used to explain changes in strategic decision priorities, strategic outlook, and their effects on organizational structure and perceptions of organizational effectiveness criteria.
Understanding the project life span is essential for managing the complexities and dynamic nature of projects. It encompasses not just the chronological progression of a project's phases but also the strategic and organizational changes that can occur at various points throughout the life of a project.