Evaluation Heuristics Sample Clauses

Evaluation Heuristics. The other aspect of the ASIL optimisation algorithm is the evaluation heuristics. These are used to evaluate each individual in a population to determine their “fitness” scores – high-scoring individuals are kept, poor-scoring ones are not. Typically the optimisation problem itself is defined in terms of objectives – e.g. minimise cost, maximise safety – and thus we need to be able to evaluate according to those objectives. In a single objective approach, multiple evaluation scores are combined into one value, which is then to be either maximised or minimised. In multiple objective approaches, the scores remain separate and can be maximised or minimised individually. In the case of the ASIL optimisation, there are two objectives to consider. The first is cost: how expensive a particular ASIL allocation might be to actually implement. This need not be particularly accurate or realistic – it only matters that it helps the algorithm to differentiate between different solutions. In our case, we chose a simple heuristic that scores each ASIL in an allocation like so:  QM = 0 points  ASIL A = 1 point  ASIL B = 10 points  ASIL C = 100 points  ASIL D = 1000 points Other schemes are also possible, including linear scales (e.g. A = 1, B = 2, C = 3, D = 4) and powers of two (2, 4, 8, 16 etc.). The ASIL values in an SRA are then summed together to find a total cost for that particular SRA. Thus an SRA of AABD will get a cost of 1012, whereas AACC would have a cost of 202. The other heuristic to consider is the number of invalid (failed) allocations. Each cut set in the FTA results is subject to one or more DSR – derived safety requirement – that indicates the minimum ASIL that has to apply to that cut set in order to meet the overall system safety requirements. Unlike the exhaustive ASIL decomposition algorithm, which guarantees that all SRAs will be valid, the optimisation makes no such guarantees (and in fact doing so could hamper the algorithm’s performance and success). Thus we award 1 penalty point for every cut set that does not meet its DSRs; the goal is obviously to obtain an SRA with 0 penalty points.
Sample 1
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Related to Evaluation Heuristics

  • Evaluation Use In the event that the Software is licensed only for Evaluation Use, the terms of this paragraph shall apply. Your license to use the Software commences on installation of the Software and, unless You and NetIQ agree to a different period, will terminate after a period of 30 days (the “Evaluation Period”). You may use the Software for an unlimited number of users and servers during the Evaluation Period. At the end of the Evaluation Period, Your license to use the Evaluation version of the Software is automatically terminated. You may not extend the time limits of the Software in any manner. At the end of the Evaluation Period You agree to de-install the Software and if required by NetIQ, return all copies or partial copies of the Software or certify to NetIQ that all copies or partial copies of the Software have been deleted from Your computer libraries and/or storage devices and have been destroyed. If You desire to continue Your use of the Software beyond the Evaluation Period, You must contact NetIQ to acquire a license to the Software for the applicable fee. EVALUATION SOFTWARE IS PROVIDED ON AN “AS IS” BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OR REPRESENTATIONS OF TITLE OR NON-INFRINGEMENT.

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  • Electronic and Information Resources Accessibility and Security Standards a. Applicability: The following Electronic and Information Resources (“EIR”) requirements apply to the Contract because the Grantee performs services that include EIR that the System Agency's employees are required or permitted to access or members of the public are required or permitted to access. This Section does not apply to incidental uses of EIR in the performance of the Agreement, unless the Parties agree that the EIR will become property of the State of Texas or will be used by HHSC’s clients or recipients after completion of the Agreement. Nothing in this section is intended to prescribe the use of particular designs or technologies or to prevent the use of alternative technologies, provided they result in substantially equivalent or greater access to and use of a Product.

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