Requirement Engineering for DataWarehouse
Every
organization deals with vast amounts of data which is stored in different
formats or patterns developed on different platforms by different developers
and further form different database structures. This brings hurdles on the path
of analysts or users with respect to its access. Thus, organizations have to
write and maintain perhaps hundreds of programs that extract, prepare, and
consolidate data for its use. All this process is done with respect to Data Warehouse.
Thus ,we can define a data warehouse as “A
data warehouse is a subject oriented, integrated, non-volatile and time-variant
collection of data in support of management’s decision.”
Building of efficient
Data Warehouse and its maintenance involves extraction, cleaning and filtering
of data etc. It is a costly and time consuming process, as this is performed
before requirements are gathere-d. To overcome this problem, we should use such
a technique that helps in exploring and clarifying each requirement in detail
which can be considered while constructing the Data Warehouse at an early
phase.
Data Warehouse must be
designed keeping in mind the requirements for decision making which is often
derived from the data sources.
While working towards
the solution i.e. Building an efficient Data Warehouse we have a number of
techniques available. The technique ‘Requirement Analysis’ of ‘Requirement
Engineering’ can be combined with the Requirement gathering techniques of Data
Warehouse i.e. ‘Interview’ and ‘Survey Method’ in order to build an effective
data warehouse.
The “Interview
Technique” can be regarded as one of the best suitable technique for solving
this problem. Key facts that should be considered while applying this technique
is that the questions used in the interview should not reflect the
interviewer’s preconceived ideas, as it can influence the responses. During the
Interview, closed questions should not be asked and stressed upon because it
limits the input with respect to the subject.
Renu Yadav
Assistant Professor
BBA
Renu Yadav
Assistant Professor
BBA
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