During which stage of system development would you undertake a feasibility study?

Preliminary Investigation.

Explanation:

System Development Life Cycle is the process in which it is decided what to create, a hardware system only, a software system only or the combination of both.

There are six stages in System Development Life Cycle:

Preliminary investigation System analysis System design System acquisition System implementation System maintenance

The stage in which a feasibility study is done is the first stage, i. e. Preliminary Investigation.

Preliminary investigation is the stage in which a company makes a crucial decision. A feasibility study is made in this stage, as to whether the project undertaken is technical and economical feasible or not. In this stage, the objective of the project is also set. Resources are analyzed if they are in the required amount or not.

So, the correct answer is the Preliminary Stage.