Final answer:
The waterfall model is a sequential design process that requires all process activities to be planned before development, and is suitable even when extensive safety and security analysis is needed. While informal communication is not central to its methodology, cooperation among multiple companies is possible with adequate coordination.
Step-by-step explanation:
When evaluating statements about the waterfall model, it is crucial to understand the model's characteristics in the context of the software development process. The waterfall model is a sequential design process, with each stage following the previous one.
- a. You have to plan and schedule all of the process activities before starting software development. True. The waterfall model requires thorough planning and scheduling before development begins.
- b. The waterfall model is not suitable for the systems where there is a need for extensive safety and security analysis of the software specification and design. False. The waterfall model can be suitable for projects requiring extensive analysis since each phase allows for a detailed review before proceeding to the next.
- c. The waterfall model is not suitable in situations where informal team communication is possible. False. Informal communication can exist in the waterfall model; however, the model itself emphasizes formal communication and documentation.
- d. The waterfall model is not suitable for the systems where several companies are involved in the development process. False. The waterfall model can handle multiple companies involved, but coordination and planning are more complex.
Applying the waterfall model effectively depends on the project's nature and requirements. For example, if frequent iteration and flexibility are needed, an iterative or spiral design process may be more appropriate. However, for projects with well-defined stages and requirements, the structured approach of the waterfall model can be advantageous.