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Support and downloads.

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Included in your Maintenance & Support agreement


Free access to continued future updates of the RiskSpectrum application such as function improvements.

User support

Via Email: support.riskspectrum@lr.org

Technical support numbers

Asia and Americas: +1-713-489-3995
Europe and Africa: +44-203-608-8024

Downloads and known problems

RiskSpectrum PSA downloads and known issues


RiskSpectrum RiskWatcher downloads and known issues


RiskSpectrum RiskWatcher Web downloads and known issues


RiskSpectrum Model Builder downloads and known issues


  • RSAT 3.4.5 released (RiskSpectrum PSA 1.4.0/RSAT 3.4.5) (15 June 2020)

    RSAT 3.4.5 resolves two issues for MSC analysis cases (merging of MCS lists) in presence of success modules: MCS BDD quantification and cutset minimization. Success modules are now quantified correctly also when an MCS BDD is built from a demodularized MCS list containing several success modules which depend on the failed part. Improved identification of success modules leads to a more efficient minimization.

    This RSAT version also includes the novel quantification method 'Initiator and All Barriers' (I&AB) module as an add-on. This method allows to take repairs of components into account in a computationally efficient way, scaling to real-life PSA models.

    Download RSAT 3.4.5

  • RSAT 3.4.4 released (PSA 1.4.0 / RSAT 3.4.4) (28.11.2019)

    A RSAT patch release to RiskSpectrum PSA 1.4.0 is now available. The patch updates RSAT only.

    RSAT 3.4.4 resolves the identified issue regarding special cases of MUX quantification. The issue relates to partitioning of the MCS list into groups (MUX).

    The most likely effect of the issue is triggered by analyses where the MCS list contains only one event from a MUX group represented in the MCS list. This could cause the algorithm to incorrectly throw an error message "ERROR: There are too many MCUB groups as a consequence of too many MUX events." This will stop the calculation. Alternatively, it could cause an unexpected termination of RSAT.

    There is a very rare situation where the issue can cause that MCSs are assigned to the wrong MUX group. This would have the effect that MCUB would apply between MCSs, which should be summed up. The impact of this very rare situation would hence be a slight underestimation of the combination. In normal cases where the conditional probability is low (frequency event excluded from cut set) this has a negligible impact. All regression tests performed by LR has shown no difference in results due to this issue.

    Download RSAT 3.4.4 https://rs-downloads.digitalproducts.group/RiskSpectrumPSA

  • RiskSpectrum PSA viewer for PSA 1.4.0 released (28.11.2019)

    A new viewer version for RiskSpectrum PSA 1.4.0 has been released.

    Download RiskSpectrum PSA 1.4.0 https://rs-downloads.digitalproducts.group/RiskSpectrumPSA

  • RiskSpectrum PSA 1.3.2 (RSAT 3.4.0) released with Limbr (28.11.2019)

    As part of the transition to the new Limbr licensing system, we have now released RiskSpectrum PSA 1.3.2 using Limbr. This is to help clients to transfer from the HASP protection to the Limbr licensing.

    The functionality in RiskSpectrum PSA 1.3.2 is exactly the same as the previous release, if the maintenance module is installed including MCS BDD. The RSAT version installed is then RSAT 3.4.0.

    The released version with Limbr is the same combination: PSA 1.3.2 and RSAT 3.4.0.

    Download RiskSpectrum PSA 1.3.2 https://rs-downloads.digitalproducts.group/RiskSpectrumPSA

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