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olap - How do I add KPI targets to my cube that are at a higher grain to my fact table? -
i have simple star schema 2 dimensions; course , student. fact table enrolment on course. have kpi values set use data in fact table (e.g. percentage of students completed course). working great.
i need add kpi goals though different grain fact table. goals @ course level, should work @ department level, , whatever combination of dimension attributes selected. have numerator , denominators kpi goals want aggregate these when there multiple courses involved - before dividing actual percentage goal.
how can implement this? understanding should have 1 fact table in star schema. in case perhaps store higher grain values in fact table? or create dimension these values in? or alternative solution?
in cases expect kpi measures calculated existing measures in cube, can away idea of fact table changes, , set kpis calculated members in cube or mdx?
your issue complicated kpi granularity being different, yes...but hide kpi measures when such level of granularity being displayed. can implement within calculated measure definition too.
for example, have used isleaf()
detect if measure shown @ bottom level, , return blank/null. or can check level number of relevant dimensions.
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