In statistical quality control, the CUSUM (or cumulative sum control chart) is a sequential analysis technique developed by E. S. Page of the University of Cambridge. It is typically used for monitoring change detection. CUSUM was announced in Biometrika, in 1954, a few years after the publication of Wald's sequential probability ratio test (SPRT).
{{Infobox control chart | name = CUSUM chart | proposer = E. S. Page
| subgroupsize = n = 1 | measurementtype = Cumulative sum of a quality characteristic | qualitycharacteristictype = Variables data | distribution = Normal distribution
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).