In the study of stochastic processes in mathematics, a disorder problem or quickest detection problem (formulated by Kolmogorov) is the problem of using ongoing observations of a stochastic process to detect as soon as possible when the probabilistic properties of the process have changed. This is a type of change detection problem.
- Shiryaev (2007) page 208
- H. Vincent Poor and Olympia Hadjiliadis (2008). Quickest Detection (First ed.). Cambridge: Cambridge University Press. ISBN 978-0-521-62104-5.
- Shiryaev, Albert N. (2007). Optimal Stopping Rules. Springer. ISBN 3-540-74010-4.
- Gapeev, P.V. (2005) The disorder problem for compound Poisson processes with exponential jumps. Ann. Appl. Probab. Volume 15, Number 1A, 487–499. 
- Kolmogorov, A. N., Prokhorov, Yu. V. and Shiryaev, A. N. (1990). Methods of detecting spontaneously occurring effects. Proc. Steklov Inst. Math. 1, 1–21.
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