Why did a change from war production to consumer production change the economy?

A change from war production to consumer production change the economy because it changes the requirement of population after the war. In war production the demand of weapons is more while in consumer production the demand of daily goods and services are included. It is thought that postwar employment rate will drop and economy will decrease but a change from war production to consumer production increases the economy because then every country try to fuel consumer demand and it give employment opportunity in factories and other areas as well.