ORGANISING DATA
DATA AS ORGANISATIONAL RESOURCE
Before the computer came
into existence, there were many limitations associated with the physical
handling of documents and human processing. Computers came into existence to
speed up the data processing. Computers helped to manage data.
We are living in the age
of information processing. The ability to acquire accurate and timely data,
managing data efficiently, is all through which an organization succeed.
The development in
hardware has catalysed rapid development in software and now we are having more
sophisticated software to handle data as it was earlier.
The term data and
information are often taken as to mean the same thing. Data are the details
about factories, outlets, staff, competitors, customers and suppliers. Data is also
kept for monitoring the activities and processes in business. Once businesses collect
these details, information comes into picture. Information is the
collection of meaningful facts that are derived from the data. Information is
significant and relevant to the user unlike data, which has no meaning alone.
Information leads to decision and thus an appropriate action. In fact,
information consists of only the data that is useful, meaningful and needed.
You come across many information systems in your daily life like banking
information system, ticketing and reservations systems etc. Now what you get
out of these information systems is pure information and these systems work out
this information on the basis of data. In other words, data is raw and
information is refined. The exact form of the refinement depends on the type of
application one is dealing with.
The data must be accurate,
timely and relevant. It is desired that any information system should have
accurate data to work on. Inaccurate data howsoever well analysed will hardly
be useful for any decision-making. Although collection of accurate data is
costly and time consuming, every effort should be made to make it as accurate
as possible. One may strike a balance between the cost of processing and value
of accuracy. The data should also be timely. If the right data is not available
at the right time then it is worth little use. For example if the updating of electoral
lists cannot take place before the schedule of elections then it is of no use
to the elections. The timeliness of the data is detrimental of success of any
information system. The data should be relevant. For better understanding of
the organizations and their information needs data has to be high on the
relevance factor. There are many Decision-Support Systems (DSS) and Executive
Support Systems that are present in today’s scene, but the general feeling
is that often the data is generating accurate and timely information, that is
not very relevant. However, the future looks bright because of the emergence of
high-end computing machines, sophisticated data capturing devices and other
technology driven tools. Technology is making data available in larger
quantities than ever before, due to lower cost storage, increased processing
speeds, higher capacity communications and increased variety of information
formats.
ORGANISING
DATA
In earlier times, data
processing was done manually. Organizations appoint a large number of people
called clerks. The information technology devices used at that time was forms,
ledger books and basic mechanical adding machines. The results of such manual
operations were obtained at a time when the information was almost out of date
(e.g. census). Then some systems were invented in which processing was mostly
mechanized e.g. Hollerith Tabulation System. In such systems data was recorded
in the binary form of holes in cards, using a cardpunch. These stacks of cards
could be sorted and tabulated. IBM and Remington Rand led the development of punched
card technology.
Things have changed
considerably with the advent of computers. There are a few terms that you need
to know about the data organization. IT-specific encyclopaedia of whatis.techtarget.com
and searchdatabase.com defines theses terms as follows:
Bit: A bit (short for binary digit) is the smallest unit of data in a
computer. A bit has a single binary value, either 0 or 1. Although computers
usually provide instructions that can test and manipulate bits, they generally
are designed to store data and execute instructions in bit multiples called
bytes. In most computer systems, there are eight bits in a byte.
Byte: In most computer systems, a byte is a unit of data that is eight
binary digits long. A byte is the unit most computers use to represent a character
such as a letter, number, or typographic symbol (for example, “g”, “5”, or
“?”). A byte can also hold a string of bits that need to be used in some larger
unit for application purposes.
Field: A field is an area in a fixed or known location in a unit of
data such as a record, message header, or computer instruction that has a
purpose and usually a fixed size. In some contexts, a field can be subdivided
into smaller fields. In a database table, a field is a data structure for a
single piece of data. Fields are organized into records, which contain all the
information within the table relevant to a specific entity. For example, in a
table called customer contact information, telephone number would likely be a
field in a row that would also contain other fields such as street address and
city. The records make up the table rows and the fields make up the columns.
Record: In a database, a record (sometimes called a row)
is a group of fields within a table that are relevant to a specific entity. For
example, in a table called customer contact information, a row would likely
contain fields such as: ID number, name, street address, city, telephone number
and so on.
File: In data processing, using an office metaphor, a file is a
related collection of records. For example, you might put the records you have
on each of your customers in a file. In turn, each record would consist of
fields for individual data items, such as customer name, customer number,
customer address, and so forth.
Database: A database is a collection of information that is organized so
that it can easily be accessed, managed, and updated. In one view, databases
can be classified according to types of content: bibliographic, full-text,
numeric, and images.
In relation to database,
an entity means a person, place, or thing that we wish to collect
information on (e.g. customers). The word root is from the Latin, ens,
or being, and makes a distinction between a thing’s existence and its
qualities. Attribute is a characteristic of an entity (e.g. customer’s
salary, customer’s address).
In a Database
Management System (DBMS), an attribute may describe a component of the
database, such as a table or a field, or may be used itself as another term for
a field. Key Field is a special field that uniquely identifies a single
record (e.g. customer’s registration number). It can be a collection of
fields.
In a database management
system (DBMS), files are either organised sequentially (one record after
another, used for batch processing) or organised in an indexed sequential form
(in sequence, but records can be directly accessed using an index) or in the
form of direct or random form (records located using a key field generated by a
mathematical formula.)
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