Description: The Percentage of Importance Indice (Percentage_I.I.) bases in magnitudes, frequencies, and distributions of occurrence of an event (DEMOLIN-LEITE, 2021) <http://cjascience.com/index.php/CJAS/article/view/1009/1350>. This index can detect the key loss sources (L.S) and solution sources (S.S.), classifying them according to their importance in terms of loss or income gain, on the productive system. The Percentage_I.I. = [(ks1 x c1 x ds1)/SUM (ks1 x c1 x ds1) + (ks2 x c2 x ds2) + (ksn x cn x dsn)] x 100. key source (ks) is obtained using simple regression analysis and magnitude (abundance). Constancy (c) is SUM of occurrence of L.S. or S.S. on the samples (absence = 0 or presence = 1), and distribution source (ds) is obtained using chi-square test. This index has derivations: i.e., i) Loss estimates and solutions effectiveness and ii) Attention and non-attention levels (DEMOLIN-LEITE,2024) <DOI: 10.1590/1519-6984.253215>.

Title: Robust Multiple Imputation with Generalized Additive Models for
Authors@R: c(person("Daniel", "Salfran", email = "daniel.salfran@uni-hamburg.de", role = c("aut", "cre")),
person("Martin", "Spiess", email = "martin.spiess@uni-hamburg.de", role = c("aut", "ths")))
Description: Provides new imputation methods for the 'mice' package based on generalized additive models for location, scale, and shape (GAMLSS) as described in de Jong, van Buuren and Spiess <doi:10.1080/03610918.2014.911894>.
Imports: purrr, extremevalues, gamlss.dist, lattice

Authors@R: c(person("Daniel", "Salfran", email = "danielsalfran@gmail.com", role = c("aut", "cre")),
person("Martin", "Spieß", email = "martin.spiess@uni-hamburg.de", role = c("aut", "ths")))

Title: Obtaining and Estimating Unidimensional IRT Dual Models
Authors@R: c(person("David", "Navarro-Gonzalez", email = "david.navarro@urv.cat", role = c("cre", "aut")),
person("Pere Joan", "Ferrando", email = "perejoan.ferrando@urv.cat", role = "aut"))
Description: Performs a unified approach for obtaining and estimating
unidimensional Item Response Theory (IRT) Dual Models (DMs), proposed by
Author: David Navarro-Gonzalez [cre, aut],