PLM, BOM & Digital Thread worked example

Obsolete Drawing Risk with severity if an obsolete drawing reaches the floor of 3 score: a worked example

Suppose severity if an obsolete drawing reaches the floor falls to 3 score. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate obsolete drawing risk for plm, bom and digital thread using production-ready inputs so teams can rank risks and decide which issue needs containment, controls, or escalation first.

The inputs for this scenario

  • Severity if an obsolete drawing reaches the floor (1-10): 3 score (the input this scenario stresses; the baseline uses 6)
  • Likelihood a superseded drawing gets built to (1-10): 4 score (held at the documented default)
  • Chance the wrong revision is caught before machining (1-10): 3 score (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Obsolete drawing risk score = obsolete drawing risk severity score × obsolete drawing risk occurrence score × obsolete drawing risk detection score.
  • Obsolete drawing risk score works out to 3.35 score at these inputs, and this is the headline figure for the scenario.
  • Obsolete drawing risk severity score works out to 3 score at these inputs.
  • Obsolete drawing risk occurrence score works out to 4 score at these inputs.
  • Obsolete drawing risk detection score works out to 3 score at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where severity if an obsolete drawing reaches the floor sits at 6 score and the headline result is 4.55 score, this scenario comes in 26.37% below the baseline at 3.35 score.
  • It multiplies your severity, occurrence, and detection scores into a single Risk Priority Number for the failure mode of building to an obsolete drawing revision. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Obsolete drawing risk score: 3.35 score (headline result)
  • Obsolete drawing risk severity score: 3 score
  • Obsolete drawing risk occurrence score: 4 score
  • Obsolete drawing risk detection score: 3 score

Run it with your numbers

  • To rerun this with your own numbers, open the live Obsolete Drawing Risk calculator, set severity if an obsolete drawing reaches the floor to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.