Walmart pays faster, but they are just as aggressive at having their hooks into your financials as Apple and pressuring your margins down. If you update or re

Walmart pays faster, but they are just as aggressive at having their hooks into your financials as Apple and pressuring your margins down. If you update or replace your ERP system, your contracts with Walmart require you to integrate the new system with Walmart's. If you weren't paying attention upfront, the required changes can quickly make your ERP implementation explode over-budget.