What kind of real time problems and issues arise in Data Modelling

Hellooo experts,
I am not a BW expertise, so just want to gather some knowledge on Problems and issues related to DATA MODELLING, if any body have a document or a link can you please snd it to [email protected] or reply to this post. I promise to reward you for proper answers hope this is the way i say thanks for your help.
kishore

hi kishore,
The first and most important problem is to understand <b>Clients requirement</b>. Clients even some time not aware of how to utilize efficiency of BW, as they are very much use to with traditional SAP R/3 reporting. So most of time we have to suggest options to client.
If we come to technical aspect, than identifying <b>Key Figures and Characterstics</b> is the most important task. And how you map that to <b>available infoobjects</b>. Attributes also plays major roles, like which attributes is better to use as navigational one and which as exclusive attribute.
Their is long list for data modelling issues, its better you refer either <b>Mastering BIW</b> book by Mac'Donalds. And SAP Help Library is also having good material.
regards,
kamaljeet

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