forecast

hello all ,

I would like to know how oracle generate forecasts by seasonality , I am using EBS r12 / supply chain planner , when I generates forecasts ,

I noticed that  seasonality index in the log file are offset from what is defined in the forecast rule .

help pls

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forecast, dmd[i-1], base0, base1, *trend, season[j-1], prd_seq_num

forecast = 541630.000000 541630.000000 1083260.000000 1083260.000000 0.000000 0.500000 1 0.900000 0.000000 0.500000 639180.000000

forecast = 551385.000000 639180.000000 1083260.000000 1102770.000000 0.000000 0.508178 2 0.900000 541630.000000 0.500000 561406.000000

forecast = 551483.597263 561406.000000 1102770.000000 1102967.194526 0.000000 0.586208 3 0.900000 639180.000000 0.500000 657133.000000

forecast = 1104769.446023 657133.000000 1102967.194526 1104769.446023 0.000000 0.713529 4 0.900000 561406.000000 1.000000 753120.000000

forecast = 1099841.132140 753120.000000 1104769.446023 1099841.132140 0.000000 0.776563 5 0.900000 657133.000000 1.000000 826791.000000

forecast = 1644487.494341 826791.000000 1099841.132140 1096324.996227 0.000000 0.746792 6 0.900000 753120.000000 1.500000 726975.000000

forecast = 1626058.406182 726975.000000 1096324.996227 1084038.937455 0.000000 0.444980 7 0.900000 826791.000000 1.500000 355300.000000

forecast = 1055481.296786 355300.000000 1084038.937455 1055481.296786 0.000000 0.100000 8 0.900000 726975.000000 1.000000 0.000000

period,forecast,trend,season,seq num = 0 1055481.296786 0.000000 1.000000 9

period,forecast,trend,season,seq num = 1 1055481.296786 0.000000 1.000000 10

period,forecast,trend,season,seq num = 2 1583221.945178 0.000000 1.500000 11

period,forecast,trend,season,seq num = 3 1055481.296786 0.000000 1.000000 12

period,forecast,trend,season,seq num = 4 1055481.296786 0.000000 1.000000 13

period,forecast,trend,season,seq num = 5 1055481.296786 0.000000 1.000000 1