PLM, BOM & Digital Thread worked example

Obsolete Drawing Risk with severity if an obsolete drawing reaches the floor of 15 score: a worked example

Push severity if an obsolete drawing reaches the floor up to 15 score and the picture changes. This example computes every intermediate figure at that operating point. Use it when obsolete drawing risk in plm, bom and digital thread needs a defensible ranking against other plm, bom and digital thread risks for the next review.

The inputs for this scenario

  • Severity if an obsolete drawing reaches the floor (1-10): 15 score (raised for this scenario; the documented default is 6)
  • Likelihood a superseded drawing gets built to (1-10): 4 score (unchanged)
  • Chance the wrong revision is caught before machining (1-10): 3 score (unchanged)

Working through the calculation

  • Applying the documented formula (Obsolete drawing risk score = obsolete drawing risk severity score × obsolete drawing risk occurrence score × obsolete drawing risk detection score) to the inputs above produces each figure below.
  • At this operating point the engine returns 8.15 score for obsolete drawing risk score, the number this scenario is built around.
  • At this operating point the engine returns 15 score for obsolete drawing risk severity score.
  • At this operating point the engine returns 4 score for obsolete drawing risk occurrence score.
  • At this operating point the engine returns 3 score for obsolete drawing risk detection score.

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 79.12% above the baseline at 8.15 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. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Obsolete drawing risk score: 8.15 score (headline result)
  • Obsolete drawing risk severity score: 15 score
  • Obsolete drawing risk occurrence score: 4 score
  • Obsolete drawing risk detection score: 3 score

Run it with your numbers

  • Every input above is editable in the live Obsolete Drawing Risk calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.