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|Title: ||A comparison of approaches to stepwise regression on variables sensitivities in building simulation and analysis|
|Authors: ||Wang, Mengchao|
Wright, Jonathan A.
Brownlee, Alexander E.I.
Buswell, Richard A.
|Keywords: ||Global sensitivity analysis|
Standardized (rank) regression coefficients
|Issue Date: ||2016|
|Publisher: ||© Elsevier|
|Citation: ||WANG, M. ...et al., 2016. A comparison of approaches to stepwise regression on variables sensitivities in building simulation and analysis. Energy and Buildings, 127, pp. 313–326.|
|Abstract: ||Developing sensitivity analysis (SA) that reliably and consistently identify sensitive
variables can improve building performance design. In global SA, a linear regression
model is normally applied to sampled-based solutions by stepwise manners, and the
relative importance of variables is examined by sensitivity indexes. However, the
robustness of stepwise regression is related to the choice of procedure options, and
therefore influence the indication of variables’ sensitivities. This paper investigates the extent to which the procedure options of a stepwise regression for design objectives or constraints can affect variables global sensitivities, determined by three sensitivity indexes. Given that SA and optimization are often conducted in parallel, desiring for a
combined method, the paper also investigates SA using both randomly generated samples and the biased solutions obtained from an optimization run. Main contribution
is that, for each design objective or constraint, it is better to conclude the categories of variables importance, rather than ordering their sensitivities by a particular index. Importantly, the overall stepwise approach (with the use of bidirectional elimination, BIC, rank transformation and 100 sample size) is robust for global SA: the most important variables are always ranked on the top irrespective of the procedure options.|
|Description: ||This paper was accepted for publication in the journal Energy and Buildings and the definitive published version is available at http://dx.doi.org/10.1016/j.enbuild.2016.05.065.|
|Version: ||Accepted for publication|
|Publisher Link: ||http://dx.doi.org/10.1016/j.enbuild.2016.05.065|
|Appears in Collections:||Published Articles (Civil and Building Engineering)|
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