the type and u201c all u201d as the operator and analyzing the event log 101 shown in fig4 the solid line arrows denote dependence relationships and the broken line arrows denote dependence relationships deleted in the processing of s 503 in fig8 referring to the matrix x 6 902 on the first row indicating the operation a only the second column indicating the operation b is 1 and therefore an arrow 1003 is drawn from a vertex 1001 corresponding to the operation a to a vertex 1002 corresponding to the operation b dependence relationships are expressed similarly from the operation b to the operation f more specifically the fourth column on the second row is 1 and therefore an arrow is drawn from b to d while the fourth column on the third row is also 1 and therefore an arrow is drawn from c to d as regards the fourth row the fifth and sixth columns have a value of 1 and therefore arrows are drawn from d to e and f thus the directed graph shown in fig1 is obtained next a processing procedure performed by the time series pattern generation module 108 when the transition probability 305 is specified as the type 302 of the time series pattern on the command specification screen 300 in fig5 will be described fig1 is a flowchart illustrating a processing procedure of the time series pattern generation module 108 when u201c transition probability u201d is specified as the time series pattern analysis type according to the embodiment of this invention upon reception of the event processing order information of an instance the.