During the execution of a project the project manager notices that only one team member has one of the technical skills needed to build the product. The project manager is afraid this might have a fut

Excluding activities from the roadmap is not a solution to a skill gap; it's a scope reduction that avoids the problem rather than solving it, likely impacting the product's value.

Encouraging working in pairs (pairing) and knowledge sharing is an excellent internal strategy to rapidly cross-train team members and disseminate critical skills. The single expert can mentor others, reducing the bus factor and building collective capability for future activities.

Teaching the entire team the new skill is too broad and often unrealistic for a project manager to do personally, and it's less specific than facilitating professional training or encouraging peer knowledge sharing.

Facilitating a training event with an external trainer is a direct and efficient way to upskill multiple team members in the specific technical skill required. This formal training helps address the identified skill gap systematically and ensures that at least three people, as required, will gain the necessary expertise for upcoming activities.

Increasing time estimates might temporarily adjust the schedule but does not solve the fundamental problem of a lack of skilled personnel and will still likely impact quality and the overall project timeline.