A delay analysis device includes a receiving unit that receives a result of a timing analysis of a target circuit to be analyzed, a detecting unit that detects critical paths having delays within a predetermined range, a statistical-delay computing unit that computes a statistical delay of the target circuit based on a cumulative probability distribution of the delays of the critical paths, and a probability-density-distribution computing unit that computes a probability density distribution of delay of a critical path that has the greatest delay in the result. The detecting unit detects x number of critical paths having cumulative delays within computed probability density distribution.

 
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