No. It allows both quantitative and qualitative approaches (see annexes C, D and E of IEC 61508-5).
Note that risk analysis generally requires a wide range of expertise. It will usually be necessary for a team to work together and reach agreement.
This text contains extracts from the IEC Functional Safety Zone. All such extracts are copyright of International Electrotechnical Commission © 2005, IEC, Geneva, Switzerland. All rights reserved. IEC has no responsibility for the placement and context in which the extracts are reproduced. This notice takes precedence over any general copyright statement.
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