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Devil
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In the process of extracting data from one source and then transforming the data and loading it to the next layer, the whole nature of the data can change considerably. It might also happen that some information is lost while transforming the data. A reconciliation process helps to identify such loss of information.
One of the major reasons of information loss is loading failures or errors during loading. Such errors can occur due to several reasons e.g.
- Inconsistent or non coherent data from source
- Non-integrating data among different sources
- Unclean / non-profiled data
- Un-handled exceptions
- Constraint violations
- Logical issues / Inherent flaws in program
- Technical failures like loss of connectivity, loss over network, space issue etc.
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