Manufacturing Project Portfolio & Capex calculator

Project Risk Score Calculator

The Project Risk Score adapts the FMEA Risk Priority Number to capital and improvement projects, combining how bad a risk's impact is, how likely it is to occur, and how hard it is to spot early into a single comparable number. Project managers and PMO leads use it to rank a risk register so mitigation effort and contingency dollars flow to the threats that actually matter. It matters because most project risk registers are flat lists where a minor schedule wobble sits next to a vendor-bankruptcy threat — the score forces those onto one scale so the steering committee can focus.

What this calculator does

  • Estimate project risk for manufacturing project portfolio and capex using production-ready inputs so teams can rank risks and decide which issue needs containment, controls, or escalation first.
  • Use it when project risk in manufacturing project portfolio and capex needs a defensible ranking against other manufacturing project portfolio and capex risks for the next review.
  • It multiplies a risk's impact, probability, and detection difficulty into a single project risk score for ranking a risk register.

Formula used

  • Project risk score = project risk severity score × project risk occurrence score × project risk detection score
  • Use the same scoring scale across comparable project risk risks.

Inputs explained

  • Impact severity if risk occurs (1-10):
  • Probability of occurrence (1-10):
  • Difficulty of early detection (1-10):

How to use the result

  • Use it at project kickoff and every gate review to re-rank open risks and target mitigation.
  • As a multiplicative score it can hide a catastrophic-but-rare risk behind a moderate one with a higher product — always eyeball high-severity items regardless of total.

Common questions

  • How do you calculate a project risk score? Multiply three 1-10 scores: impact severity x probability of occurrence x detection difficulty. With 6 x 4 x 3 the risk scores against others rated on the same scale, with higher meaning more urgent.
  • What is a good project risk score? It's relative, not absolute. On a 1-10 scale the max is 1000. Many PMOs set a mitigation threshold around 100-150; risks above it get an owner and a plan, those below get monitored.
  • What's the difference between project risk score and a probability-impact matrix? A standard matrix uses only probability and impact. The risk score adds detection difficulty, which captures whether you'd even see the risk coming — a crucial third dimension a 2x2 grid misses.
  • Why include detection difficulty for project risks? Because a risk you can monitor and react to early is far less dangerous than one that blindsides you. Two risks with identical impact and probability are not equal if one has an early-warning indicator and the other doesn't.
  • How often should I re-score project risks? At every gate or steering review. Probability and detectability shift as the project progresses — a supplier risk that was likely at design freeze may drop once a contract is signed.

Last reviewed 2026-05-12.