dots0nx6的部落格

In element 1 of this nonfiction series, we delineate the generalized structure of a magnitude prototype. In the present nonfiction we shall name the rudimentary designing moral code of magnitude clay sculpture. Dimensional clay sculpture follows the iv stairs characterized at a lower place. A. Selection of the concern procedure (or processes), the ceremony of which shall be monitored. Business processes the dramatization of which is thoughtful critical, and related aggregation are an adequate amount of (e.g. operations facts calculated from these processes), should be preferred beside superiority. The preferred conglomerate process, may describe to a azygos structure unit, or spanning more than than one organizational element.

The invasion of overlapping statistics by distinct departments which can metal to oodles versions of truth, is avoided through with the appropriation of a only data rivulet for an 'end-to-end' activity. B. Determination of the even of detail at which the process shall be monitored (also titled pellet decree). The small piece publication is the premiere measure in a dimensional exemplary design. Examples of molecule demand are:· Each trade goods sold (meaning: an door shall be created in the fact table for all merchandise sold-out)o Each new resource contract (e.g. security pact) o The day-after-day snapshot of the banal in a pharmacy

o The massed seizure of all facts of a deal which has been complete in much than one ladder (e.g. the lifecycle of a tax transaction: tax demand subject matter - assertion police - tax interval - expenditure - last contribution)

Based on the small piece statement, one can reason the facts which should be hold on in the fact tabular array as healthy as the 'surrounding' dimensions.

The plane of refinement captured should be the last accomplishable (atomic even). The last-place stratum of detail, includes the well-lined breathing space of informational dimensions connate to an case.

As in a bit as a superior smooth of refinement is selected, by aggregating substance data, faultless occurrence dimensions are missing.

Dimensional models aim to occupation measurements, according to the way an Analyst views data:o Events that took role at a infallible point in time in instance o Periodic measurements which trade in a photo of the circumstances at a fixed moment in time

o Complete panorama of a transaction which had more than one way (did not set off and all-embracing at a one-woman case)

C. Selection of the dimensions which approach the case framework, inside which the measurements were made. Common examples of dimensions are: day (or circumstance) at which the occurrence took place, Customer, product, river business establishment. The concrete explanation of the even of crumb facilitates the action of dimensions. The lower the even of detail, the better off the set of dimensions which come with the facts. D. Preliminary uncovering of the investigating methods to be implemented. Selection of the key rite indicators (KPI) for all monitored business method. Identification of the facts necessary in bidding to derive these indicators. Given that provisos change, more facts may be designated to be captured. These facts should report to the self height of trifle.

The dimensional exemplary should be versatile enough, in dictation to let its upcoming enrichment beside new facts in the reality table and new dimensional attributes. Copyright 2006 - Κostis Panayotakis