Qualitek-4 (QT4) is Windows software for Automatic Design and Analysis of the Taguchi Experiments. The software was originally introduced by Nutek Inc. in 1987 as Qualitek-3, and later enhanced in 1996 as Qualitek-4 for Windows (3.1). For the past several decades, engineering and scientific professional used QT4 in their efforts to optimize product and process designs. The current version of the software is compatible with most currently available Windows 10 and other versions.
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