vlad

Contains functions to set up risk-adjusted quality control charts in health care. For the variable life adjusted display (VLAD) proposed by Lovegrove et al. (1997) doi:10.1016/S0140-6736(97)06507-0 signaling rules derived in Wittenberg et al. (2018) doi:10.1002/sim.7647 are implemented. Additionally, for the risk-adjusted cumulative sum chart based on log-likelihood ratio statistic introduced by Steiner et al. (2000) doi:10.1093/biostatistics/1.4.441 average run length and control limits can be computed with fast and accurate Markov chain approximations developed in Knoth et al. (2019) doi:10.1002/sim.8104.