This review aims to provide a comprehensive update on the progress made on the Sequential Testing problem (STP) in the last 20 years after the review, [1] was published. Many studies have provided new theoretical results, extensions of the problem, and new applications. In this review, we pinpoint the main results and discuss the relations between the problems studied. We also provide possible research directions for the problem.

翻译：本文旨在对自综述文献[1]发表后近20年来序贯检验问题（STP）的研究进展进行全面更新。大量研究提出了新的理论成果、问题扩展及创新应用。本综述聚焦于核心研究成果，探讨各研究问题间的关联，并为该领域提供潜在的研究方向。