Final answer:
A detailed design is necessary when considering project complexity, budget constraints, and team availability. The correct answer is option B), C) and D).
Step-by-step explanation:
A detailed design is necessary when considering project complexity, as it helps in understanding and addressing the intricate aspects of the design. For complex projects, a detailed design allows designers to analyze and solve challenges that arise from the project's complexity.
Additionally, budget constraints play a role in determining the necessity of a detailed design. It helps the designers in making informed decisions about resource allocation and cost-effectiveness while maintaining the desired quality of the design.
Finally, team availability is another factor that designates the need for a detailed design. The availability of the team members and their expertise determines the feasibility and efficiency of the design process.