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IBM Cognos TM1 Developer's Certification Guide by James D. Miller

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Time dimension maintenance

Time dimensions, like any other dimension in IBM Cognos TM1, must first be initialized (created) and then maintained to keep the current dimension with the model's requirements. It is important to get a clear and accurate understanding of all of the reporting needs of the application or model owners before building the TM1 time dimension to ensure its usability.

Initialization

In some cases, the initialization of the model will include multiple forward years so that the time dimension maintenance will almost be non-existent for the foreseeable future. This means that the time dimension will include multiple dates past the current and next calendar and/or fiscal years. This is referred to as future proofing the time dimension. ...

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