Project Input refers to all physical and non-physical assets that are used as the basis for adding value to a given project and contributing to achieving project goals and objectives. It may take a variety of forms, from energy, process, technology and the like to requirements, guidelines, capital, etc. Project input is transformed into certain output throughout the project life-cycle.
Managing project input means identifying, estimating and using physical and non-physical assets in the project in order to ensure that these assets are sufficient for making necessary changes within the project environment. Actually, the process of making change to a project can be characterized by 4 variables:
Project change is made when enablers (people, equipment, machines) transform input into desired output (product, service, some other results) through consuming available resources (money, time, technology). Project management appears to be a mechanism of managing these variables in order to ensure balanced use of resources and smooth transformation of inputs into outputs.