Systems Used in Supply Chain Operations

Examine the three management systems used in supply chains.

APS – advanced planning and scheduling system
CRM – customer relationship management system
ERP – enterprise resource planning system

Answer the following two questions:

1. What is the difference among an APS, a CRM, and an ERP system?

2. Which of the three would be most beneficial to a retailer who could not afford all three?

please use 1-2 sources.