Explain the Term Time-Variant in the Following Data Warehouse Definition

question 7

Essay

Explain the term time-variant in the following data warehouse definition:
The data warehouse is a structured repository of integrated,subject-oriented,enterprise-wide,historical,and time-variant data.The purpose of the data warehouse is the retrieval of analytical information.A data warehouse can store detailed and/or summarized data.

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Definitions:

Cash Payback Period

The duration of time it takes for an investment to generate cash flows sufficient to recover the initial investment cost.

Factory Overhead

All manufacturing costs that are not directly associated with the cost of raw materials or direct labor, often including costs related to maintaining factory operations.

Direct Materials

Raw materials directly used in the manufacturing process of a product, easily traceable and integral to the finished good.

Direct Labor

The wages and other costs for labor that is directly involved in the manufacturing or production of goods or services.