Table 5.

Comparison of NIOSH optimization for different movement.

	Before optimization			Most comfortable			Maximum volume
Movement	LI	RWL	CLI	LI	RWL	CLI	LI	RWL	CLI
① Placing commodities in to shopping cart	0.58	10.41		0.57	10.57		0.57	10.52
② Placing commodities in to shopping cart	0.60	11.06		0.37	16.41		0.39	15.48
③ Removing weighed commodities	0.49	12.15	1.124	0.45	13.25	0.959	0.47	12.82	0.982
④ Putting back the weighed commodities	0.60	11.06		0.37	16.41		0.39	15.48
⑤ Taking out to checkout	0.49	12.15		0.45	13.25		0.47	12.82