Assigning $$workers $$additional $$tasks $$at $$the $$same $$level $$of $$responsibility $$to $$increase $$the $$number $$of $$tasks $$that $$they $$have $$to $$perform $$is $$known $$as

$1$

$)$

$$job $$enlargement$.$

$2$

$)$

$$job $$rotation$.$

$3$

$)$

$$job $$enrichment$.$

$4$

$)$

$$task $$identity$.$

$5$

$)$

$$skill $$variety$.$