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Primary Secondary Tertiary
researched. derived from primary sources. convenient form.
Appearance / They formally appear in print or In the form of publications. Few reference materials and
Existence electronic formats. textbooks.
How to collect? Can be collected through Through published and Through
unpublished documents.
Direct personal a. Abstracts
Investigation.
b. Bibliographies
Indirect oral investigation.
c. Classifications
Local Correspondents.
d. Directories
Mailed questionnaire.
e. Encyclopedias
Questionnaire through
enumerators. f. Fact Books
g. Guide books
Tiny sector:
The tiny enterprise is a business enterprise that falls under the tiny sector where in the total amount
invested in plant and machinery does not exceed ₹ 25 lakhs at present and is likely to increase in future.
Large scale enterprise
The industrial units whose investment in plants and machinery exceeds ₹ 10 crores is known as large
scale enterprise.
Medium Scale Enterprise
A medium scale enterprise is one in which the investment in plant and machinery is more than ₹ 5
crores and less than ₹ 10 crores.
Differences between an ancillary unit and a tiny unit
The following are the differences between an ancillary unit and a tiny unit.
