Answer: Planning or Preliminary Phase
Explanation: At this stage, the alternative solution, cost and benefit of the project is considered. It is the first phase in the system life cycle process.
Here, it is identified if there is actually a need and how to determine the way out for the need.
At this stage, alternative solutions are stated, with associated costs as well as benefits to be derived from picking any of the available options.
thereafter, a recommendation is given as to the best option to be considered.