When workers collectively stop to work in an industry with an intention to make the management agree to their demands, they are said to be on strike.

Strike can be classified into following types:

i.) Economic strike - for demands like wages and bonus

ii.) Sympathetic strike - to support the strike in other units.

iii.) General Strike - Strike by all the unions in an industry or region.

iv.) Sit down strike - Workers come to the work place but do not work

v.) Slow down strike - Workers work but at a low efficiency

vi.) Sick - A large number of members call in sick on the same day.

vii.) Wild cat strikes - Carried out with the consent of unions.