Management oversight and risk tree (MORT) analysis is used to identify inadequacies in barriers and controls ,specific barrier and support functions and management functions .It identifies specific factors relating to an occurrence and identifies the management factors that permit these risk factors to exist .MORT /Mini-MORTis used to prevent oversight in the identification of causal factors .It lists on the left side of the tree specific factors relating to the occurrence ;and on the right side of the tree ,it lists the management deficiencies that permit specific risk factors to exist .Management factors support each of the specific barrier and control factors .Included is a set of questions to be asked for each of the barrier and control factors on the tree .As such ,they are useful in preventing oversight and ensuring that all potential causal factors are considered .It is especially useful when there is a shortage of experts of whom to ask the right questions .However ,because each management oversight factor may apply to specific barrier and control factors ,the direct linkage or relationship is not shown but is left up to the analyst .For this reason .Events and causal factor analysis and MORT should be used together for serious occurrences :one to show the relationship ,the other to prevent oversight .A number of condensed versions of MORT ,called Mini-MORT ,have been produced .For a major occurrence justifying a comprehensive investigation ,a full MORT analysis could be performed while Mini-MORT would be used for most other occurrences .