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Project quality management
Published in John M. Nicholas, Herman Steyn, Project Management for Engineering, Business and Technology, 2020
John M. Nicholas, Herman Steyn
Tests are performed against earlier developed system objectives, systems specifications, and normal user requirements. Sometimes, in addition, they are performed in excess of specifications for normal conditions to determine the actual capacity or point of failure of the system. In stress tests, an increasingly severe test load is applied to the system to determine its capability to handle heavier than probable conditions, sometimes until the system fails. In fatigue tests, the system is subjected to an increasing load or repeated cycles until it fails; this is done to determine the system’s ultimate capacity. Contracts for development projects sometimes not only specify design requirements and performance criteria but also the types of tests to verify them. Often the criteria and conditions for the tests are specified in the quality plan.
Strength and failure of bituminous materials
Published in Marios Soutsos, Peter Domone, Construction Materials, 2017
Fatigue tests may be conducted in two ways. They may be constant stress tests, where each load application is to the same stress level regardless of the amount of strain developed. Alternatively they may be constant strain tests, where each load application is to the same strain level regardless of the amount of stress required.
Testing
Published in Paul H. King, Richard C. Fries, Arthur T. Johnson, Design of Biomedical Devices and Systems, 2018
Paul H. King, Richard C. Fries, Arthur T. Johnson
Stress testing (Table 13.6) is designed to ascertain how the product reacts to a condition in which the amount or rate of data exceeds the amount or rate expected. Stress tests can help determine the margin of safety that exists in the product or equipment.
From systemic financial risk to grid resilience: Embedding stress testing in electric utility investment strategies and regulatory processes
Published in Sustainable and Resilient Infrastructure, 2022
Mercy Berman DeMenno, Robert J. Broderick, Robert F. Jeffers
Once system performance has been quantified in the desired unit of analysis, the consequence-focused performance metrics can be calculated. Through multiple runs, stress tests can be used to evaluate how components and systems respond to various threats and levels of disruption, as well as the resulting economic and social consequences. While using stress tests in this manner may be sufficient to benchmark resilience, stress testing could also be used to bolster resilience by helping utilities prioritize among potential investments. At the simplest level, such analysis could be used to determine whether the costs of potential mitigations are justified by the projected benefits, as measured by the change in performance via resilience metrics. At a more advanced level, stress tests could support analyses of multiple resilience mitigations, metrics, and scenarios, enabling multi-objective investment optimization for resilience, sustainability, and other goals.