What is the primary concern when user stories are written but not fully understood?

When user stories are written but not fully understood, the primary concern is poor communication with the development team. This situation indicates that there might be gaps in the shared understanding between the product owner (or stakeholders) and the development team regarding the requirements and expectations.

Effective communication is crucial in agile methodologies because it ensures that all team members have a clear and consistent understanding of what needs to be built. If user stories are vague or lacking clarity, the team may end up implementing features that do not align with the stakeholders' needs, which can lead to rework, wasted effort, and ultimately, a product that does not meet its intended purpose.

Ensuring that there is a strong collaborative process for discussing and refining user stories can significantly mitigate misunderstandings and align the team's efforts with the project aims. This leads to more efficient workflows and better project outcomes.

Considering the other options, while lack of stakeholder involvement, insufficient documentation, and inadequate technology can affect project outcomes, they don't directly address the core issue of comprehension and shared understanding arising from poor communication. In this case, the focus is specifically on the interaction and clarity between the parties involved in the development process.