Controller PLC spare parts ABB module PFSA140 3BSE003816R1
Technical data of product parameters
When creating guidance such as the PFSA140 3BSE003816R1
Protocols, a key issue is how prescriptive should be the
requirements for researchers. It is tempting to develop protocols that are very prescriptive and dictate
that PFSA140 3BSE003816R1
research should be conducted with a particular study methodology and should produce a
particular statistical reliability. For instance, the empirical Bayes before-after study design is widely
recognized as the state-of-the-art methodology for PFSA140 3BSE003816R1
development, and thePFSA140 3BSE003816R1
Protocols could
stipulate that a PFSA140 3BSE003816R1
should be developed with this method in order to be considered acceptable.
However, that level of prescriptiveness is likely to interfere in a negative way with the research being
conducted. The prescribed study methodology may not be appropriate for the countermeasure being
studied, or it might not even be possible to do, depending on the nature of the countermeasure. It may
also unnecessarily restrict the use of more innovative and advanced methods (e.g., full Bayes beforeafter) that may provide more insight.
For example, consider the case where an empirical Bayes before-after study was prescribed, but the
research topic was evaluating the safety effect of increasing median width. It would be practicallyPFSA140 3BSE003816R1
infeasible to conduct the prescribed before-after study on this countermeasure, since a transportation
agency would rarely undertake the expense of expanding and realigning an entire roadway solely for the
sake of widening the median. The most feasible and appropriate study design for this evaluation may be
a cross-sectional regression study, where roadways with wide medians are compared to roadways with
narrow medians
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reminder
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