Which System to use.

[gumdigger]

Hi
I have a situation at my work place where i have trouble comparing results of employes sales each week As i have to pay them a bonus if they exceed sales target. Which following system should i use inorder to get this done

ERP - Enterprise resource planning
MIS - Management Information Systems
DSS - Decision support systems
ESS - Employee Self Service
GSS - Group Decision Support Systems
GDSS - Group Decision Support Systems