Work backward from a target completion date using your own stage durations. The calculator deliberately avoids universal default timelines because project conditions vary materially.
Fields start empty because ShelterMetric does not insert universal project durations. Use your project plan, procurement schedule, contract assumptions or responsible specialist estimates.
The timeline is most useful when durations come from actual source-data requirements, design scope, procurement procedure, supplier or contractor commitments and acceptance requirements. Parallel work and project-specific dependencies should be reviewed separately.