NOVELTY - The system has one or more processor units configured to receive (301) a first forecast comprising a first set of scenarios for a first time period. The first set of scenarios is reduced (303) to a first subset of scenarios. A second forecast comprising a second set of scenarios is received (305) for a second time period. The second set of scenarios is reduced (307) to a second subset of scenarios. A scenario tree having an inter-period independency is generated (309) based on the first subset of scenarios and the second subset of scenarios.    USE - System for providing scenario tree generation based on scenario reduction for stochastic unit commitment problem relates to wind power generation (all claimed).    ADVANTAGE - The property of the reduced distribution helps in reducing the computational effort of scenario reduction and in generating scenario trees from continuous distributions. Reduction can be performed at each time period of the original distribution independent of the other time periods. The decoupling property enables to reduce the combinatorial-sized scenario tree with much smaller computational effort, and enables to reduce continuous probability measures with inter-period independency property to much smaller discrete probability measures.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a method for providing scenario tree generation based on scenario reduction; and    (2) an article of manufacture comprising storage medium storing program for providing scenario tree generation based on scenario reduction.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating the process for providing scenario tree generation based on scenario reduction.    Step for receiving first forecast comprising first set of scenarios for first time period (301)    Step for reducing first set of scenarios to first subset of scenarios (303)    Step for receiving second forecast comprising second set of scenarios for second time period (305)    Step for reducing second set of scenarios to second subset of scenarios (307)    Step for generating scenario tree having inter-period independency based on subsets of scenarios (309)