High-risk input combinations

Pipe estimation failures typically come from wrong schedule-thickness mapping, OD copy errors, and unrealistic quantity entries. These are easy to miss when rows are bulk-imported or manually duplicated.

Row-level hard checks

Apply non-negotiable geometric checks before calculation and before export. Hard checks reduce expensive downstream exceptions.

  • Reject any thickness value greater than or equal to OD/2.
  • Flag rows where unit weight deviates sharply from same-size neighbors.
  • Require explicit confirmation on unusually high quantity rows.

Grouped review before release

Review totals by OD and schedule class, not only grand total. Group-level anomalies are easier to detect than line-level noise in long tables.