Page 64 - Sattva_2025

The BSO line stands for Basic Safety Objective. Once the level of risk is reduced to

the BSO it is not mandated to use resources to reduce risk to zero.
The BSL line is a Basic Safety Limit , above which risks are intolerable, which is

subjected to change depending upon any change in technology, resources etc , and
hence the BSO. This is very similar to current regulatory thresholds. The area in

between the BSO and BSL is the ALARP region as described above.
These approaches lead to the possibility of early mitigation measures and marshalling

resources more effectively during development and inform decisions throughout the

entire process. Action plans resulting from such measures are driven by the
expressions SFAIRP and ALARP.

All potential additional risk controls which could be employed to further minimise the

consequences associated with each outcome should be identified using structured
expert judgement and brainstorming. Where a number of controls are proposed, they

should be assessed in combinations rather than individually in order to determine the
lowest residual risk that can be achieved within the bounds of reasonable

practicability.

Risk Rating System

To determine the relative significance of risks a risk assessment matrix is used. A
typical general representation of same is presented below.

Table1- Risk Rating Matrix