sub·de·ci·sion | \ ˌsəb-di-ˈsi-zhən \
variants: or sub-decision
plural subdecisions or sub-decisions

Definition of subdecision 

: one of a set of relatively small decisions that are involved in making a larger decision For example, suppose that in a decision problem the contending options are a, b, and c. One subdecision is between a and b. Another subdecision is between b and c. If a is adopted over b, and b is adopted over c, then the combination of subdecisions yields a as the resolution of the overall decision problem. —Paul Weirich

First Known Use of subdecision

1909, in the meaning defined above

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The first known use of subdecision was in 1909

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