We are releasing another major patch for stats4ROI! This adds a number of new features to the app including improved SPC charts, Process Performance Analsis (helping you prioritize your improvement efforts), runs tests, autocorrelation analysis, distribution fitting, and basic reliability analysis!
You can download it here:
(You can read the complete stats4ROI Changelog here)
- Added Features
- Added Process Performance Analysis.
- Added distribution fitting and analysis.
- Added limits to attribute chart limit data.
- Added CUSUM charts
- Added EWMA charts
- Added Runs test to Nonparametric Tests tab
- Added autocorrelation analysis and graphs
- Added a new menu item with reliability tools
- Added basic reliability calculator
- AMSAA growth analysis and planning
- Weibull analysis
- Added predict() fallback for very large number of factors so that the optimizer on Results works the same as on the Optimizer tab. This avoids extremely large reference grid needed for emmeans().
- Added the ability to use a label column for SPC charts
- Added "Show all points" to SPC charts
- Added "Show Specifications" to SPC charts, but only if "Show all points" is selected
- Improvements
- Optimized screening design for large designs. If a design cannot fit a resolution IV or V or if the number of columns needed is more than Tsui preferred slots, the algorithm will bail to level III design logic and quickly find a solution.
- Reduced delay incurred when unchecking effects for pooling
- Improved defaults for variable data SPC limits so that they match the dispersion selected.
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Bug Fixes
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Fixed bug in the Show Analysis part of SPC that would show up if you only entered a target, or entered the target first.
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- Known issues:
- datamods no longer will load .dat files with only one column - this is a limitation in the packages it uses. A fix is in the works. A workaround is to save that as a .txt file or just cut and paste the data.
- If you run the app from RStudio and you have clicked on a line number to add a breakpoint, it will take a long time to load the app - this is due to RStudio functions that take 10+ seconds to load. Once they are loaded, it does not affect the app. Consider loading via RGui if this is an annoyance since it loads immediately there. This does not happen if you avoid adding a breakpoint that way.
- Lin-Mudholkar test fails due to breaking the function when the correlation is 1 (lolcat issue)
- No button on MVP(E) or Mann-Whitney-U test to stop early - may be added in the future
- The density plot x-axis for the exponential will start at zero even if the minimum is above that. This seems to be built into ggh4x.