The best time to conduct a risk analysis in a software development project is at each stage of the development life cycle. This is because risks can emerge or change at any point of the project, and they need to be identified, assessed, and managed as soon as possible. By conducting a risk analysis at each stage, the project team can ensure that the risks are aligned with the project objectives, scope, and deliverables, and that the appropriate risk responses are implemented and monitored. Conducting a risk analysis at each stage can also help to avoid or reduce the impact of potential issues, such as schedule delays, cost overruns, quality defects, and customer dissatisfaction. The other options are not the best time to conduct a risk analysis, although they may be useful or necessary depending on the project context and nature. Conducting a risk analysis during the business requirement definitions phase is important, but it is not sufficient, as the risks may change or evolve as the project progresses. Conducting a risk analysis before periodic steering committee meetings is a good practice, but it is not the only time to do so, as the risks may arise or escalate between the meetings. Conducting a risk analysis during the business case development is a part of the project initiation process, but it is not the most effective time, as the risks may not be fully known or understood at that stage.Reference:= Risk and Information Systems Control Study Manual, 7th Edition, Chapter 2: Risk Identification, Section 2.1: Risk Identification Process, p. 79-80.