NEWS
AccSamplingDesign 0.0.9.9000
Bug fixes
- Known-theta Beta variables plans now meet both risk constraints at the
delivered (rounded-up) sample size. Previously, the soft-penalty
constrained search could return a plan that already violated
PR <= alpha or CR <= beta, and rounding the sample size up could not
repair it. The search is now refined by solving the two binding risk
equations (Nelder-Mead in log coordinates), the sample size is rounded
up from the binding solution, and both risks are verified at the
delivered size. Known-theta sample sizes are now the minimal feasible
integers, e.g. the reported moisture case (PRQ = 0.005, CRQ = 0.01,
USL = 0.05, theta = 500) changes from n = 112 (violating both risks) to
n = 117. If the refinement does not converge, the constrained-search
solution is delivered after verification, with a warning.
- For known-theta Beta plans, the reported
PR and CR, the OC curve and
the plots now describe the delivered integer plan, and n equals
sample_size. Unknown-theta plans keep the previous reporting semantics.
accProb() no longer fails for a Beta plan with acceptability constant
k = 0 (floating-point cancellation made the closed-form discriminant
marginally negative).
AccSamplingDesign 0.0.9 (2026-08-25)
New features
- Added analytical Delta--MLE and Delta--MoM methods for Beta variables
acceptance sampling when the precision parameter, theta, is unknown.
- Delta--MLE is now the default unknown-theta method. The sample-size
adjustment used in version 0.0.8 remains available as
"gk_adjustment".
Documentation
- Added the citation for the AccSamplingDesign article published in The R
Journal, volume 18, issue 1, pages 368--381
(doi:10.32614/RJ-2026-007).