เปรียบเทียบวิธี

	ทฤษฎีความเป็นไปได้	ความน่าจะเป็นที่ไม่แม่นยำ
สาขาวิชา	การคำนวณแบบอ่อน	การคำนวณแบบอ่อน
ตระกูล	Machine learning	Bayesian methods
ปีกำเนิด	1988	1991
ผู้ริเริ่ม	Lotfi Zadeh; Didier Dubois & Henri Prade	Peter Walley
ประเภท	Uncertainty quantification framework	Set-valued probability model
แหล่งต้นตำรับ	Dubois, D., & Prade, H. (1988). Possibility Theory: An Approach to Computerized Processing of Uncertainty. Plenum Press. ISBN: 978-0-306-42520-2	Walley, P. (1991). Statistical Reasoning with Imprecise Probabilities. Chapman & Hall. ISBN: 978-0-412-28660-5
ชื่อเรียกอื่น	Fuzzy Possibility Theory, Possibilistic Reasoning, Olasılık Teorisi (Bulanık), Possibility Distribution Theory	Lower-Upper Probability, Robust Bayesian Analysis, Credal Set Theory, Belirsiz Olasılık
ที่เกี่ยวข้อง	3	3
สรุป	Possibility Theory is a mathematical framework for representing and reasoning under uncertainty, introduced by Lotfi Zadeh in 1978 and systematically developed by Didier Dubois and Henri Prade in their 1988 monograph. It uses possibility distributions — functions assigning a degree in [0,1] to each element of a universe — to encode what is plausible or consistent with available information, complementing probability theory for situations where data is scarce or knowledge is imprecise.	Imprecise probability is a generalization of standard probability theory that represents epistemic uncertainty through sets of probability measures, called credal sets, rather than a single precise distribution. Introduced systematically by Peter Walley in his 1991 monograph, the framework characterizes beliefs via lower and upper probabilities (or previsions), bracketing the range of plausible probability assignments when available information is insufficient to determine a unique measure.