Sourcing Strategies: Best Practices
 

Hello,

I am researching best practices used in sourcing the following categories:

1) Market Data Services
2) Sales and Marketing Consulting
3) Risk Management Insurance
4) Building Construction Services
5) Building Maintenance Services


Which sourcing practices do you find most effective in relation to these categories? (i.e. reverse auctions, RFPs)

Approximately how much do you save using these tactics to source these categories?