Which of the following is a challenge of rapid application development?

Rapid application development (RAD) emphasizes quick development and iteration, often leading to challenges in engaging users effectively throughout the process. One significant challenge is that, due to the fast-paced nature of RAD, there may not be sufficient time to gather and incorporate user feedback adequately. Rapid iterations can result in users not having the opportunity to fully explore and respond to prototype versions or initial builds, which may lead to products that do not fully meet their needs or expectations. This insufficient user involvement can create gaps in understanding the actual user requirements, ultimately affecting the system’s usability and effectiveness.

In the context of the other options, increased documentation requirements could actually be seen as a benefit in some methodologies that prioritize thoroughness over speed, while higher reliance on formal methods might contradict the flexibility that RAD typically offers. Additionally, RAD often enhances team collaboration rather than reduces it, as quick cycles may foster better communication among team members to adapt to changes and user feedback. All these aspects highlight why inadequate user feedback stands out as a notable challenge in rapid application development.