Due to its high capital investment, operating and maintenance cost, a port should be managed as efficiently as possible. Learning from the best practices ports operating under similar conditions is a very useful strategy for maintaining competiveness. Under such a competitive environment, port performance measurement is not only a powerful management tool for port operations, but also constitut...

Data envelopment analysis (DEA) and free disposal hull (FDH) estimators are widely used to estimate efficiencies of production units. In applications, both efficiency scores for individual units as well as average efficiency scores are typically reported. While several bootstrap methods have been developed for making inference about the efficiencies of individual units, until now no methods hav...

Order picking is a crucial but labor- and cost-intensive activity in the retail logistics e-commerce domain. Comprehensive changes are implemented this field due to new technologies like AI automation. Nevertheless, human worker’s activities will be required for quite some time future. This fosters necessity of evaluating manual picker-to-part operations. We apply non-parametric Data Envelopmen...

Abstract This paper surveys the increasing use of statistical approaches in non-parametric efficiency studies. Data Envelopment Analysis (DEA) and Free Disposable Hull (FDH) are recognized as standard methods developed field operations research. Kneip et al. (Econom Theory, 14:783–793, 1998) Park 16:855–877, 2000) develop properties variable returns-to-scale (VRS) version DEA estimators FDH est...

Tracing back from Charnes, Cooper and Rhodes [9] many approaches have been proposed to extend the DEA production model to non-convex technologies. The FDH method were introduced by Deprins, Simar and Tulkens [13] and it only assumes a free disposal assumption of the technology. This paper, continues further an earlier work by Briec and Horvath [7]. Among other things, a new class of semilattice...

Familial dysalbuminemic hyperthyroxinemia (FDH) is a familial autosomal dominant disease caused by mutation in the albumin gene that produces a condition of euthyroid hyperthyroxinemia. In patients with FDH, serum-free thyroxine (FT4) and free triiodothyronine (FT3) concentrations as measured by several commercial methods are often falsely increased with normal thyrotropin (TSH). Therefore, sev...