Date Check — Multi Skill Expiry

: Excel + email reminders → 23% of nurses had at least one expired skill at random audit.

[ R_\textteam = \sum_i=1^n \sum_j=1^ w_ij \cdot \mathbf1 t ij < t_now + \delta ] multi skill expiry date check

[ \textMSEDC(e_i) = s_j \in S_i \mid t_ij < t_now + \delta ] : Excel + email reminders → 23% of

If ( t_ij < t_now ), the skill is . If between ( t_now ) and ( t_now + \delta ), it is critical . Otherwise valid . 2.3 Multi-dimensional expiry risk The aggregate skill expiry risk for a team/department is: multi skill expiry date check