5.4 — Residual risks

Page /ebios/risquesresiduels — compares the raw risk (before treatment) with the residual risk (after applying the measures defined in the PACD), for each risk in the summary.

Header

Statistics shown: number of risks, number of measures.

Tabs

Tab	Content
Risk matrices	Two Severity × Likelihood matrices side by side: raw and residual
Summary by risk	Detailed raw / residual / measures list for each risk

Risk matrices tab

Two matrices are displayed side by side, linked by a → After treatment arrow:

• Raw risk — initial positioning of each risk (carried over from Workshop 4)
• Residual risk — positioning after re-rating following treatment measures

Each risk can be dragged and dropped from one cell to another in either matrix to manually adjust its positioning. Risks not yet placed in the residual matrix appear in a To place pool below the matrix.

Summary by risk tab

Column	Description
#	Risk number
Risk	Label
Associated FE	Related feared event, with its severity
Raw risk	Likelihood/Severity pair and risk level before treatment
→	Improvement arrow (symbol indicating whether the risk has decreased, stayed the same, or worsened)
Residual risk	Likelihood/Severity pair and risk level after treatment — shows Not rated if re-rating has not been done yet
Treatment	Type of treatment applied (carried over from page 5.2)
Measures	Associated measures (carried over from the PACD)

Re-rate after each significant measure

A risk showing Not rated as residual means the likelihood has not yet been reassessed after measures. Re-rate it as soon as the main PACD measures are defined, to get a reliable view of the improvement achieved.

Residual risk to be accepted

Once the measures are applied, the residual risk must be formally accepted by the project or organisation owner — this is the last validation step of Workshop 5 before the final report.

Next step

Once residual risks are validated, generate the EBIOS RM Report to formalise the whole study.

See also Workshop 5 — Overview and PACD.