Adjust logic in the HSSM class for missing data and deadlines

**Current Implementation**
- For the first pass implementation, the current logic for missing data and deadlines could be bypassed.

Start by locating the HSSM class and reading the current handling of missing data and deadlines. The issue does not identify files, tests, expected behavior, or acceptance criteria, so the intended completed behavior must be clarified before implementation.

Written by the indexing model from the issue text.